Pipefitter & Steamfitter
Only four states issue a pipefitter license as its own thing: Massachusetts, Minnesota, Rhode Island, and Michigan. Everywhere else you're licensed as a plumber or a mechanical contractor, and the boundary between "plumbing" and "pipefitting" is drawn by the state, not by you. Massachusetts draws it at 700,000 BTU — above that heating threshold you're a pipefitter, below it you're not. The trap worth knowing before you move: your state's electrician reciprocity has nothing to do with this trade, because a different board runs it.
Where can I take my pipefitter & steamfitter license?
Pick the state you're licensed in. You'll get the states that will consider that license — which is not the same as a free transfer.
FAQ
Does my pipefitting experience count if I move?
Sometimes — but usually as exam eligibility, not an exam waiver, and that distinction matters. Rhode Island spells it out in regulation: an out-of-state Class I journeyperson license lets you be tested for the Rhode Island license. Minnesota credits high-pressure pipefitting work done outside the state toward its four-year requirement, then still makes you sit the exam. That's a genuine benefit — it can save you years — but it isn't reciprocity, and anyone telling you your license transfers is wrong. Where actual exam waivers exist they're narrow: Mississippi's board says Tennessee is the only state whose agreement covers mechanical and plumbing trades at all.
Pipefitter & Steamfitter rules in every state
Researched 2026-07-21 to 2026-07-24One entry per state, in alphabetical order. Each one covers who licenses the trade there, what it takes to qualify, and whether that state accepts a license earned somewhere else.
- Reciprocity — accepts some out-of-state licenses
- No reciprocity — licensed here, but no out-of-state license is accepted
- Nothing to reciprocate — no state license exists here
- Not established — we could not verify this state's position — treat it as an open question, not a no
- secondarydrawn from consistent secondary sources, not confirmed on the agency's own page
Alabama
State licenseBoard certification required to contract or engage in plumbing/gas fitting, with no dollar threshold. Same board and structure documented for Alabama plumbing.
Alabama licenses pipefitters through the Plumbers and Gas Fitters Examining Board - the same credential documented for Alabama plumbing, which has no reciprocity agreements with any state.
Why, and what applies instead: This dataset's Alabama plumber record confirms, from board-sourced information: 'Alabama has no reciprocity agreements for this license.' Since pipefitting runs through the same Plumbers and Gas Fitters Examining Board, that finding applies.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
Alaska
State licenseSame Mechanical Inspection Section Certificate of Fitness structure documented for Alaska plumbing.
Alaska licenses pipefitters through its plumber Certificate of Fitness. No named-state reciprocity was confirmed, though a Provisional license offers a temporary bridge for out-of-state license holders while a full application processes.
Why, and what applies instead: This dataset's Alaska plumber record found a Provisional license option (temporary bridge for any valid out-of-state license holder, $150) but no confirmed named-state reciprocity for plumbing. Separately, Alaska'S DCCED construction contractor licenses have explicitly no reciprocity (confirmed in the AK roofer record).
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
Arizona
State licenseSame az ROC structure: roughly 4 years qualifying experience, trade exam, Statutes & Rules Exam (SRE), bonding and insurance. Specialty trades require licensure regardless of project size.
Arizona has no formal pipefitter reciprocity with any state - consistent with every Arizona trade. A case-by-case Out-of-State Waiver Request is the only alternative, and Arizona's Statutes & Rules exam is never waived.
Why, and what applies instead: This dataset's Arizona records confirm, from the Registrar'S own page, that Arizona has no formal bilateral reciprocity with any state for any trade. Two alternatives exist: NASCLA exam substitution (confirmed for electrical and B/KB building classifications, not confirmed for plumbing/HVAC/mechanical) and a case-by-case Out-of-State Waiver Request. The SRE is never waived.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
- https://roc.az.gov/applying-for-a-license (official, accessed 2026-07-24)
Arkansas
State licenseTwo separate credentials required. The Arkansas Department of Health administers plumbing/gas licensing (noted in the AR carpenter entry as licensing plumbers with 6 hours annual CE), while the Contractors Licensing Board handles the contractor side.
Arkansas requires pipefitters to hold both a Contractors Licensing Board credential and an Arkansas Department of Health license. Reciprocity for this pathway was not confirmed - do not assume Arkansas' extensive electrical reciprocity applies, as that is a separate board.
What applies instead: Reciprocity for the Arkansas pipefitting pathway was not confirmed in this research pass. This dataset's Arkansas plumber record likewise left the plumbing reciprocity list unconfirmed (Arkansas' own reciprocal-application form confirms a general process exists for 'Plumbing, Electrical, HVACR or other classifications' without naming states). Do not assume the well-documented Arkansas electrical reciprocity list (17 states) extends here - it is administered by a different board.
Note: Needs a dedicated follow-up with both the Arkansas Contractors Licensing Board and the Department of Health.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
- https://www.labor.arkansas.gov/wp-content/uploads/Reciprocal-Form-March-2025.pdf (official, accessed 2026-07-24)
California
State licenseNo separate pipefitter credential. Which CSLB classification applies depends on the specific work: steam/process piping generally falls under C-4 (Boiler, Hot Water Heating and Steam Fitting) or C-36; HVAC-related piping under C-20. Standard CSLB requirements apply: 4 years journeyman experience, trade + law/business exams, $25,000 bond.
California has no standalone pipefitter license - the work falls under existing CSLB classifications (C-36 plumbing, C-20 HVAC, or C-4 boiler/steam fitting). CSLB's reciprocity with Arizona, Louisiana, Mississippi, Nevada, and North Carolina applies where the specific classification qualifies.
What's actually required: Because pipefitting runs through standard CSLB classifications, the CSLB reciprocity program already documented for California's plumber and HVAC records applies here - subject to the classification appearing on the Reciprocal Classifications List for that state pair.
Note: Which CSLB classification covers a given pipefitting scope wasn't independently verified against CSLB's classification descriptions - confirm with CSLB for a specific scope of work.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
- https://www.cslb.ca.gov/Contractors/Applicants/Reciprocity/Reciprocity_Requirements.aspx (official, accessed 2026-07-24)
Colorado
State licenseSame DORA State Plumbing Board structure documented for Colorado plumbing: no apprentice license (registration only), Journeyworker requires apprenticeship completion + exam, Master requires an additional year + exam.
Colorado licenses pipefitting through DORA's plumbing framework, which has no formal reciprocity agreements - just case-by-case endorsement review for substantial equivalency. Denver runs its own separate system.
Why, and what applies instead: This dataset's Colorado plumber record confirms Colorado has no formal named-state reciprocity for plumbing - DORA instead runs a case-by-case endorsement review for substantial equivalency (exam basis, code edition, training hours). Denver operates its own separate licensing authority outside the state framework.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
Connecticut
State licenseSame DCP individual-licensing structure documented for Connecticut's other trades: apprentice registration with ct DOL, then journeyperson and contractor levels via experience + exam.
Connecticut licenses pipefitting through its Plumbing & Piping Contractor license. Connecticut has no reciprocal agreements with any jurisdiction - its own licensing department says so explicitly.
Why, and what applies instead: Connecticut's own official DCP page, cited in the CT electrician entry, states verbatim: 'Connecticut does not have reciprocal agreements with any other jurisdiction.' A separate source confirms DCP 'Generally does not offer reciprocity for state-licensed building trades.' This applies to the Plumbing & Piping license.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
- https://portal.ct.gov/DCP/License-Services-Division/All-License-Applications/Electrical-License (official, accessed 2026-07-24)
Delaware
State licenseDivision of Professional Regulation licensing, plus Construction Contractors Certificate registration with the Dept. Of Labor and a Division of Revenue business license.
Delaware's plumbing/pipefitting reciprocity with Maryland is cross-confirmed from Maryland'S side (Master level). Delaware generally handles reciprocity as a case-by-case 'substantially similar' review rather than a fixed state list.
What's actually required: The Maryland relationship is cross-confirmed from Maryland's own official page. The DE electrician entry confirms Delaware'S general approach via its administrative code: reciprocity is a case-by-case 'substantially similar' review rather than a fixed named-state list. Delaware's complete outbound plumbing list wasn'T independently verified.
- https://www.labor.maryland.gov/license/pl/plrecip.shtml (official, accessed 2026-07-24)
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
Florida
State licenseSame CILB structure documented for Florida plumbing/HVAC: certified (statewide) or registered (local), trade + business & finance exams, 4 years experience, financial responsibility, insurance.
Florida has no standalone pipefitter license - the work falls under plumbing or mechanical contractor licensing, neither of which has formal reciprocity with any state (only case-by-case endorsement), per DBPR's own reciprocity form already documented.
Why, and what applies instead: This dataset's Florida plumber and HVAC records both confirm (from DBPR'S own reciprocity form CILB 32) that formal reciprocity covers only General/Building/Residential classifications - not plumbing or mechanical. Pipefitting, running through those same classifications, therefore has no formal reciprocity either; case-by-case endorsement (form CILB 10) is the only pathway.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
- https://www2.myfloridalicense.com/pro/cilb/documents/CILB32_Reciprocity.pdf (official, accessed 2026-07-24)
Georgia
State licenseSame divisions documented for Georgia plumbing and HVAC: board application, PSI exam, continuing education.
Georgia has no standalone pipefitter license - the work falls under plumbing or conditioned-air licensing. Georgia's plumbing licensing has explicitly no reciprocity with any state; the conditioned-air side has narrow reciprocity with South Carolina and Texas. Confirm which classification applies to your scope.
Why, and what applies instead: Georgia's own Secretary of State FAQ, already cited in the GA plumber entry, states: 'Georgia does not have reciprocity with any other states for Master or Journeyman Plumbers.' If the work instead falls under Conditioned Air, that record documents narrow reciprocity with South Carolina and Texas. Given the plumbing side is an explicit no and the applicable classification for pipefitting wasn'T confirmed, the answer here is recorded as no.
Note: Which Georgia classification governs pipefitting specifically wasn't confirmed - the answer determines whether any reciprocity applies.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
- https://sos.ga.gov/page/division-master-and-journeyman-plumbers-faq (official, accessed 2026-07-24)
Hawaii
State licenseSame CLB structure documented for Hawaii: 4 years supervisory experience within the last 10 years, trade exam + Business & Law exam (75%+ each), general liability insurance, case-by-case bond. $1,000 threshold applies to all contracting work.
Hawaii has no pipefitting reciprocity with any state - its licensing agency states it plainly, and applies it across all trade boards. Out-of-state experience may count toward Hawaii's hour requirements, but Hawaii'S exams are always required.
Why, and what applies instead: This dataset's Hawaii records confirm - from an official government source quoting DCCA policy - that 'Hawaii does not have reciprocity agreements with other jurisdictions.' This is one of the most consistently-confirmed no-reciprocity findings in the dataset (5+ independent sources for electrical), and DCCA applies it across its licensing boards. Out-of-state experience may count toward Hawaii'S hour requirements, but the exam is always required.
- https://www.governmentjobs.com/careers/hawaii/jobs/newprint/1056915 (official, accessed 2026-07-24)
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
Idaho
State licenseSame DOPL Plumbing Bureau structure: individual journeyman/master credentials plus a business Plumbing Contractor license requiring a designated master plumber.
Idaho's plumbing/pipefitting reciprocity is cross-confirmed with Washington and Oregon from those states' own official pages. Idaho's complete list wasn'T independently verified - and its extensive 13-state electrical reciprocity is a separate program that doesn't automatically extend here.
What's actually required: Both relationships are cross-confirmed from the other states' own official pages (Washington L&I and Oregon BCD). Idaho'S own complete outbound list for plumbing wasn't independently verified from DOPL'S materials - one source characterized Idaho's plumbing reciprocity as more informal and limited than its electrical program (13 states, well documented).
- https://lni.wa.gov/licensing-permits/plumbing/plumber-certification/ (official, accessed 2026-07-24)
- https://www.oregon.gov/bcd/licensing/pages/reciprocal.aspx (official, accessed 2026-07-24)
Illinois
No license — state or localNo license exists for this trade at any level — state or local — in this state.
No state credential. Note that plumbing work IS licensed statewide by IDPH (documented separately), so the boundary between pipefitting and plumbing work matters for compliance.
Illinois does not license pipefitters at all - confirmed by a State of Illinois government source. There is no reciprocity because there is no license. (Plumbing is separately licensed statewide by IDPH, with no reciprocity.)
What applies instead: No pipefitter license exists in Illinois, so no reciprocity framework applies. Illinois' separately-documented plumbing license has explicitly no reciprocity with any state.
- https://apps.illinoisworknet.com/cis/clusters/OccupationDetails/100413?parentId=110200§ion=license§ionTitle=Licensing+/+Certification (official, accessed 2026-07-24)
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
Indiana
No state license — local/city licensing onlyThere is no state license for this trade — licensing, where it exists, happens at the city or county level.
If the work constitutes plumbing, Indiana's statewide plumbing licensure applies (576 classroom hours + 6,400 OJT hours over 4 years, then exam, under IC 25-28.5). Otherwise local rules govern.
Indiana has no standalone pipefitter license - plumbing is the only construction trade Indiana licenses statewide. If your work falls under plumbing, note that Indiana's reciprocity statute promises more than it delivers: it requires mutual recognition that no state currently appears to meet.
What applies instead: No standalone pipefitter credential exists. If the work falls under Indiana's plumbing license, the IN plumber entry documents a genuine nuance: IC 25-28.5-1-19 technically allows reciprocity 'Without examination,' but gates it on the other state having substantially equal standards and extending the same privilege back to Indiana - and no state currently appears to satisfy that mutual-recognition condition in practice.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
- https://law.justia.com/codes/indiana/title-25/article-28-5/chapter-1/ (official, accessed 2026-07-24)
Iowa
State licenseIowa licenses plumbing and mechanical systems contractors at the state level (distinct from its general Construction Contractor registration, which is registration-only with a $2,000/year threshold and no exam). Out-of-state contractors must file a $25,000 bond - notably higher than the $5,000 in-state performance bond.
Iowa licenses pipefitting through its Plumbing and Mechanical Systems Board, whose reciprocity wasn't confirmed in this research. Iowa'S well-documented electrical reciprocity is a separate board's program and doesn'T apply here.
What applies instead: This dataset's Iowa plumber and HVAC records both left the Plumbing and Mechanical Systems Board'S reciprocity unconfirmed. Iowa's electrical reciprocity is well documented here (MN/NE/SD primary plus cross-class agreements with OK/TX/WI, from two official DIAL documents) but is administered by the separate Electrical Examining Board - it does not extend to plumbing or mechanical trades.
Note: Same open item flagged in this dataset's IA plumber and HVAC records - needs a dedicated check with the Plumbing and Mechanical Systems Board.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
Kansas
No state license — local/city licensing onlyThere is no state license for this trade — licensing, where it exists, happens at the city or county level.
Varies by municipality. Kansas sets no statewide competency standards for this trade.
Kansas has no statewide pipefitter license - it's entirely local, matching every Kansas trade except roofing (uniquely registered through the Attorney General). There is no state reciprocity because there is no state license.
What applies instead: No state license exists, so no state reciprocity framework applies. Note that as of October 2025, Kansas contractors were actively lobbying the legislature for a statewide electrician license specifically to enable interstate reciprocity (documented in the KS electrician entry) - confirming the absence of statewide trade licensing is a live policy issue in Kansas, not an oversight.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
Kentucky
State licenseSame DHBC Plumbing Division structure documented in the KY plumber entry: journeyman then master plumber via experience + exam.
Kentucky licenses pipefitting through DHBC's Plumbing Division, whose reciprocity list wasn'T confirmed. Do not assume it matches Kentucky's electrical reciprocity - that'S a different division with separately-documented agreements.
What applies instead: This dataset's Kentucky plumber record explicitly left the plumbing reciprocity list unconfirmed, with a specific warning not to assume it mirrors the electrical list. Kentucky'S electrical reciprocity is confirmed from DHBC's own application checklist (Ohio and Louisiana directly confirmed, each with different requirements; TN/WV/NC/VA secondary-sourced), but that is the Electrical Division'S program.
Note: Same open item flagged in this dataset's KY plumber record - needs a dedicated check with DHBC's Plumbing Division.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
Louisiana
State licenseLSLBC Mechanical Contractor license required for mechanical/process piping work over $10,000. A mechanical contractor performing plumbing work over $10,000 must separately hold or employ a Master Plumber. Commercial licensing threshold is $50,000 generally, but electrical/mechanical/plumbing subcontractors trigger at $10,000.
Louisiana licenses industrial pipefitting under LSLBC's Mechanical Work classification (which explicitly covers process piping), with plumbing work over $10,000 requiring a separate Master Plumber. Arkansas journeyman plumbers get an exam waiver. Louisiana'S mechanical license is recognized by Alabama and Ohio, confirmed from those states' own boards.
What's actually required: This dataset's Louisiana records document: Arkansas journeyman plumbers can waive the Louisiana exam; the Mississippi relationship is genuinely unresolved (MSBOC'S own page states no formal LA-MS agreement exists anymore, though MSBOC still honors Louisiana exam scores - which resolves an apparent contradiction found earlier); and Louisiana's Mechanical classification is accepted BY Alabama and Ohio, confirmed from those states' own boards. Louisiana's own complete inbound acceptance list for mechanical work wasn'T independently verified from LSLBC.
- https://lslbc.gov/classifications_list/mechanical/ (official, accessed 2026-07-24)
- https://hacr.alabama.gov/new-license-application/ (official, accessed 2026-07-24)
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
Maine
State licenseSame OPOR structure documented for Maine plumbing: individual journeyman/master credentials via experience + exam, with no separate contractor business license required.
Maine licenses pipefitting through its Plumbers' Examining Board, whose reciprocity wasn'T confirmed. Maine's precisely-documented electrical reciprocity (6 states journeyman, 2 master) is a separate board'S program and doesn't apply here.
What applies instead: This dataset's Maine plumber record left the Plumbers' Examining Board reciprocity list unconfirmed. Maine's electrical reciprocity is precisely documented here from Maine'S own two official license-level pages (Journeyman: NH, VT, ND, ID, OR, WY; Master: NH and VT only) - but that is the Electricians' Examining Board'S program and does not extend to plumbing or pipefitting.
Note: Same open item flagged in this dataset's ME plumber record - needs a dedicated check with the Plumbers' Examining Board.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
Maryland
State licenseSame Maryland State Board of Plumbing structure: apprentice/journeyman/master ladder, with Baltimore County and WSSC operating independently.
Maryland's only true interstate plumbing reciprocity - which covers pipefitting - is with Delaware, at the Master level only, confirmed on Maryland'S own official page. Maryland also recognizes Baltimore County and WSSC licenses, but those are internal Maryland jurisdictions, not other states.
What's actually required: Confirmed from Maryland's own official page (labor.Maryland.gov/license/pl/plrecip.shtml), documented in the MD plumber entry: the only genuine INTERSTATE plumbing reciprocity is with Delaware, Master level only. Maryland also recognizes WSSC and Baltimore County licenses, but those are Maryland'S own internal jurisdictions - not other states, and the site should not present them as such.
- https://www.labor.maryland.gov/license/pl/plrecip.shtml (official, accessed 2026-07-24)
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
Massachusetts
State licenseConfirmed from the Dept. Of Public Safety's own licensing document: 'No person shall engage in the business of a master pipefitter, or work as a journeyman or apprentice pipefitter unless they are lawfully licensed under M.G.L. 146 s.85.' Scope is statutorily defined: piping for heating systems rated OVER 700,000 BTU, steam conveyance and associated pumping equipment, vacuum and pneumatic systems, oil and petroleum products, ice-making machinery, and air conditioning equipment - the >700,000 BTU threshold is the key boundary separating pipefitting from plumbing/gas fitting work.
Massachusetts has a genuinely separate Pipefitter License (covering heating systems over 700,000 BTU, steam, vacuum/pneumatic, and petroleum piping) issued by the Dept. Of Public Safety - distinct from the plumbing license. No pipefitter reciprocity program was found; Massachusetts boards generally do not offer reciprocity.
Why, and what applies instead: Massachusetts' Division of Occupational Licensure boards consistently apply narrow or no reciprocity, and this dataset'S Massachusetts records already confirm: the CSL/contractor side states outright that Massachusetts 'does not recognize out of state contractor licenses,' and the plumbing board has no named-state reciprocity (case-by-case substantial-equivalency review only). No pipefitter-specific reciprocity program was found.
Note: The absence of pipefitter-specific reciprocity is inferred from Massachusetts' consistent board-wide pattern rather than a pipefitter-specific denial - confirm with the Dept. of Public Safety.
- https://www.mass.gov/files/documents/2016/09/vm/inf-pipe-fitter-lic.pdf (official, accessed 2026-07-24)
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
Michigan
State licenseApprentice/journeyman/master ladder administered by the same LARA Plumbing Division documented for Michigan plumbing.
Michigan issues a genuinely separate pipefitter license (apprentice/journeyman/master) through LARA's Plumbing Division - and has no reciprocity with any state, consistent with every other Michigan trade documented.
Why, and what applies instead: Michigan's own LARA FAQ, already cited 'S Michigan electrician and carpenter records, states flatly: 'Michigan does not hold reciprocal agreements with any other State.' This applies across all LARA/BCC trades, including pipefitting.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
- https://www.michigan.gov/lara/bureau-list/bcc (official, accessed 2026-07-24)
Minnesota
State licenseConfirmed from dli.mn.gov: Journeyworker HPP requires age 20+, ability to read blueprints/specs for high pressure piping, and 4 years as a registered unlicensed individual, pipefitter apprentice, OR work in high pressure pipefitting OUTSIDE Minnesota; then a $50 exam (70% to pass) and $48 license fee, valid 2 years. Master HPP requires age 21+ and 5 years in the trade. Unlicensed individuals may work only if registered with DLI or in an approved apprenticeship, under direct supervision, employed by the same licensed high pressure piping contractor (max 2 unlicensed per licensed pipefitter). A Contracting HPP license entitles the holder to work as a journeyman, but not vice versa (Minn. R. 5230.0120).
Minnesota has a genuinely separate High Pressure Pipefitter license (journeyworker, master, and contracting levels). There is no reciprocity - but Minnesota does credit out-of-state high-pressure pipefitting experience toward the 4-year requirement to sit for its exam, which is a real benefit short of reciprocity.
Why, and what applies instead: No named-state reciprocity program was found for Minnesota's high pressure pipefitter licenses. Notable: Minnesota'S own DLI requirements explicitly credit work 'in the trade of high pressure pipefitting outside of Minnesota' toward the 4-year experience requirement - that's recognition of out-of-state Experience toward exam eligibility, which is meaningfully different from reciprocity (the Minnesota exam is still required). This dataset'S Minnesota plumber record separately confirms narrow reciprocity (ND, SD) for plumbing, which does not extend to pipefitting.
- https://www.dli.mn.gov/workers/pipefitter/pipefitter-licensing (official, accessed 2026-07-24)
- https://mn.gov/elicense/a-z/index.jsp?id=1083-231548 (official, accessed 2026-07-24)
Mississippi
State license — commercial work onlyThis license covers commercial work only. Residential work is licensed separately, at the local level, if at all.
MSBOC Certificate of Responsibility with mechanical certification. Commercial threshold $50,000; mechanical/electrical/plumbing work triggers commercial licensing at just $10,000 per this dataset's MS records.
Mississippi licenses pipefitting under an MSBOC mechanical certification. Tennessee is the only state whose reciprocity with Mississippi covers mechanical trades - MSBOC's own page says so explicitly, and every other partner state'S waiver excludes mechanical work. Mississippi's law and business exam is never waived.
What's actually required: Confirmed from MSBOC's own official reciprocity page, already documented for MS plumber: Tennessee is explicitly called out as the only state whose agreement with Mississippi extends to mechanical and plumbing trades. Every other MSBOC reciprocal partner (Alabama, Florida, Georgia, North Carolina, etc.) has its waiver explicitly excluding mechanical and plumbing. The Mississippi Law and Business Management exam is never waived for anyone.
- https://www.msboc.us/contractors/reciprocity/ (official, accessed 2026-07-24)
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
Missouri
No state license — local/city licensing onlyThere is no state license for this trade — licensing, where it exists, happens at the city or county level.
Varies by municipality (Kansas City Certificates of Qualification, St. Louis License Collector, etc.).
Missouri has no statewide pipefitter license - it's regulated locally, matching Missouri'S plumbing and HVAC trades. There is no state reciprocity because there is no state license.
What applies instead: No state license exists, so no state reciprocity framework applies - matching Missouri's other non-electrical trades.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
Montana
State licenseSame Montana Board of Plumbers structure: apprentice/journeyman/master ladder with a written exam required before license issuance.
Montana licenses pipefitting through its Board of Plumbers. That board's reciprocity list wasn'T confirmed in this research - and Montana's well-documented 16-state electrical reciprocity does not automatically apply, as it'S a different board.
What applies instead: This dataset's Montana plumber record left the plumbing reciprocity list unconfirmed pending a dedicated check. Montana'S electrical reciprocity (16 states, Residential/Journeyman only, explicitly excluding Master) is well documented here but is administered by the separate State Electrical Board - do not assume it extends to plumbing or pipefitting.
Note: Montana Board of Plumbers reciprocity needs a dedicated follow-up - the same open item already flagged in this dataset's MT plumber record.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
Nebraska
No license — state or localNo license exists for this trade at any level — state or local — in this state.
No state trade credential. NDOL contractor registration ($25/year, rising to $40 effective Aug. 1, 2026) verifies business identity and workers' comp - explicitly not a competency credential. Nebraska'S only statewide-licensed trade is electrical.
Nebraska has no pipefitter licensing requirements at the state level - only contractor registration (no exam) plus local licensing in larger counties. Electrical remains Nebraska's only statewide-licensed trade.
What applies instead: No exam-based state pipefitter credential exists, so there's nothing to reciprocate. Consistent with this dataset'S other Nebraska records.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
Nevada
State licenseSame NSCB structure: experience + trade exam + Contractor Management Survey (Business & Law) exam + bond/insurance. $1,000 threshold under NRS 624.020.
Nevada offers licensure by endorsement for its Plumbing and Heating (C-1) classification - which covers pipefitting - from Arizona, California, Florida, and Tennessee. The trade exam may be waived; Nevada's Business & Law exam never is.
What's actually required: Confirmed in the NV plumber entry: states with 'substantially equivalent requirements' for the combined C-1 Plumbing and Heating classification are Arizona, California, Florida, and Tennessee. Nevada calls this 'licensure by endorsement' rather than reciprocity - the trade exam may be waived but the Business & Law (CMS) exam is required of everyone, and the endorsing state must complete a verification form. Typically requires 4-5+ years of active licensure with no disciplinary history.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
- https://www.servicetitan.com/licensing/hvac/nevada (secondary, accessed 2026-07-24)
New Hampshire
State licenseExperience + exam structure through OPLC, administered by a different board than the Electricians' Examining Board.
New Hampshire licenses pipefitting through its Mechanical Safety & Licensing Board, whose specific reciprocity list wasn't confirmed (a general case-by-case process exists). New Hampshire'S extensively-documented electrical reciprocity is a separate board's program.
What applies instead: This dataset's New Hampshire plumber and HVAC records both left the Mechanical Safety & Licensing Board'S specific reciprocity list unconfirmed, noting only that a general case-by-case process exists ('New Hampshire may grant reciprocity if your state'S licensing standards align with its own'). New Hampshire'S electrical reciprocity is thoroughly documented here - full Journeyman+Master agreements with Maine, Massachusetts, and Vermont plus a Journeyman-only NERA list, confirmed from NH's own application PDF and triangulated against Maine'S and Massachusetts's own records - but that is a separate board.
Note: Same open item flagged in this dataset's NH plumber and HVAC records - needs a dedicated check with the Mechanical Safety & Licensing Board.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
New Jersey
No license — state or localNo license exists for this trade at any level — state or local — in this state.
No separate pipefitter credential was identified. Applicable requirements depend on whether the work falls under plumbing (Master Plumber license) or HVACR (Master HVACR Contractor license), both already documented for New Jersey.
New Jersey has no standalone pipefitter license - the work falls under Master Plumber or HVACR Contractor licensing. Neither has a confirmed named-state reciprocity program; both use conditional, case-by-case review.
Why, and what applies instead: Neither of the credentials pipefitting would fall under has usable named-state reciprocity: the NJ plumber entry found no formal reciprocal agreements (conditional case-by-case review only), and the nj HVAC record found reciprocity is conditional on the home state having comparable standards and reciprocating back, with no confirmed qualifying state list.
Note: Which New Jersey credential governs a given pipefitting scope wasn't confirmed - check with the Division of Consumer Affairs.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
New Mexico
State licenseSame CID structure: journeyman certificate plus contractor (qualifying party) license, PSI trade exam + NM Business & Law exam (75% each), $10,000 bond. New Mexico has no dollar minimum - any paid construction work requires a CID license.
New Mexico licenses pipefitting through CID's Mechanical Bureau. Reciprocity for mechanical trades wasn'T confirmed - and New Mexico's well-documented 10-state reciprocity applies specifically to journeyman ELECTRICIANS, not mechanical trades. New Mexico'S plumbing side has explicitly no reciprocity.
What applies instead: New Mexico's confirmed reciprocity (10 states, from rld.nm.gov'S own page) applies to the ER-1 Journeyman ELECTRICIAN certificate specifically. The NM plumber entry found plumbing has explicitly no reciprocity, and the nm HVAC record left mechanical reciprocity unconfirmed. Pipefitting, falling under the Mechanical Bureau, inherits that unconfirmed status - do not extend the electrician list here.
Note: Same open item flagged in this dataset's NM HVAC record - needs a dedicated check with CID's Mechanical Bureau.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
New York
No state license — local/city licensing onlyThere is no state license for this trade — licensing, where it exists, happens at the city or county level.
Varies by municipality. No state credential exists.
New York has no statewide pipefitter license - licensing is entirely local, matching the pattern documented for all New York trades. There is no state reciprocity because there is no state license.
What applies instead: No state license exists, so no state reciprocity framework applies - matching every other New York trade already recorded.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
North Carolina
State licenseSame board and structure documented for North Carolina plumbing and HVAC: classified licenses by scope, experience hours + exam, SBI background check.
North Carolina has no standalone pipefitter license - the work falls under the plumbing/heating board already documented, which has no reciprocity agreements with any state. A South Carolina exam waiver and a residency-based Neighbor State pathway are the only exceptions.
Why, and what applies instead: This dataset's NC plumber and HVAC records both confirm, from the board'S own site: 'There are no license reciprocity agreements with any other state.' A South Carolina technical-exam waiver and the Neighbor State License Recognition Act (GA, SC, TN, VA, WV, residency-based) are the only narrower pathways - neither is reciprocity.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
- https://nclicensing.org/exam-information/ (official, accessed 2026-07-24)
North Dakota
State licenseTwo layers: individual plumbing credential from the State Plumbing Board, plus the Secretary of State contractor license (NDCC ch. 43-07) for any construction work over $4,000, which is insurance/registration-based with license classes A-D by project value.
North Dakota licenses pipefitting through its State Plumbing Board, with a reciprocal relationship with Minnesota cross-confirmed from Minnesota's side. North Dakota'S complete plumbing list wasn't verified, and its extensive electrical reciprocity is a separate board'S program.
What's actually required: The Minnesota relationship is cross-confirmed from Minnesota's own official DLI page. North Dakota'S own complete outbound plumbing list wasn't independently verified - the same open item already flagged in the ND plumber entry. North Dakota'S well-documented electrical reciprocity (Master with MN/SD, Journeyman with 10 states) is administered by the separate State Electrical Board.
- https://www.dli.mn.gov/workers/plumber/plumbing-reciprocity (official, accessed 2026-07-24)
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
Ohio
State license — commercial work onlyThis license covers commercial work only. Residential work is licensed separately, at the local level, if at all.
Same OCILB structure documented for Ohio's other trades: 5 years as a tradesperson in the trade + trade and business/law exams + $500,000 liability insurance + background check.
Ohio has no standalone pipefitter license - the work runs through OCILB's commercial plumbing, HVAC, hydronics, or refrigeration classifications, carrying the same reciprocity already documented for those trades (South Carolina, West Virginia, plus a Tennessee waiver arrangement).
What's actually required: Because pipefitting runs through OCILB's plumbing/HVAC/hydronics classifications, the reciprocity already confirmed 'S Ohio plumber and HVAC records applies - exam-earned licenses only, with Ohio's business & law exam always still required. Which specific classification covers a given pipefitting scope wasn'T independently verified.
Note: Which OCILB classification covers a given pipefitting scope needs confirmation with the board.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
- https://com.ohio.gov/divisions-and-programs/industrial-compliance/boards/ohio-construction-industry-licensing-board (official, accessed 2026-07-24)
Oklahoma
State licenseCIB licensing required regardless of project value for electrical, plumbing, and mechanical work (per this dataset's OK records). Apprentice/journeyman/contractor ladder.
Oklahoma licenses pipefitting through CIB's plumbing/mechanical programs, whose reciprocity lists weren'T confirmed. Oklahoma's documented 10-state electrical reciprocity - which uniquely requires true bilateral mutual recognition - is a separate program.
What applies instead: This dataset's Oklahoma plumber and HVAC records both left their specific state lists unconfirmed. Oklahoma'S electrical reciprocity is well documented here - 10 states, with the Oklahoma Administrative Code (158:40-7-5) revealing a true BILATERAL mutual-recognition requirement (the other state must also recognize Oklahoma licenses back) - but that is the electrical program specifically.
Note: Same open item flagged in this dataset's OK plumber and HVAC records - needs a dedicated check with the CIB.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
Oregon
State licenseSame BCD structure documented for Oregon plumbing. Separately, the CCB business license requires 16-hour pre-license training + exam + bond + insurance, with no dollar-value exemption beyond casual jobs under $1,000.
Oregon's plumbing reciprocity - which covers pipefitting - is limited to Idaho and Montana, confirmed on Oregon'S own BCD pages. Note the split: the individual license has that narrow reciprocity, but Oregon's CCB business license has none at all.
What's actually required: Confirmed from Oregon BCD's own reciprocal licensing pages, documented in the OR plumber entry: Journeyman Plumber reciprocity is limited to Idaho and Montana. The license must be equivalent or higher, current, active, and violation-free for 3 years. Separately, Oregon'S CCB (the business license) has no reciprocity with any state - confirmed explicitly 's OR carpenter and roofer records.
- https://www.oregon.gov/bcd/licensing/pages/reciprocal.aspx (official, accessed 2026-07-24)
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
Pennsylvania
No state license — local/city licensing onlyThere is no state license for this trade — licensing, where it exists, happens at the city or county level.
Varies by municipality; statewide HICPA registration (AG's office) applies to residential home-improvement work but is not a trade license.
Pennsylvania has no statewide pipefitter license - it's municipal, matching the pattern documented for all Pennsylvania trades. There is no state reciprocity because there is no state license.
What applies instead: No exam-based state license exists, consistent with every Pennsylvania trade already documented.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
Rhode Island
State licenseConfirmed from Rhode Island's own regulations (rules.sos.ri.gov): Pipefitter Journeyperson Class I (unlimited) requires 10,000 hours OJT + 144 hours/year trade schooling as a registered RI-approved apprentice; 2 years of accredited schooling may be deducted from the apprenticeship. Class II licenses are limited to heating installations (commercial up to 500,000 BTU; process piping not allowed). Master Class I/II authorize permits at corresponding BTU limits.
Rhode Island has genuinely separate pipefitter licensing (Journeyperson and Master, Classes I and II). There is no exam waiver - but an out-of-state Pipefitter Journeyperson Class I license makes you eligible to SIT for Rhode Island's exam, and 5 years of documented journeyperson experience works if your state has no equivalent license.
Why, and what applies instead: Confirmed from Rhode Island's own regulation text, and it draws a precise distinction worth knowing: 'An out of state Pipefitter Journeyperson Class I license will allow the applicant to be TESTED for the Pipefitter Journeyperson Class I Rhode Island license' - out-of-state licensure grants exam eligibility, not an exam waiver. If a state doesn'T offer an equivalent Class I license, a notarized resume showing 5 years' journeyperson experience serves the same eligibility purpose. This is consistent with this dataset'S other Rhode Island records, where the CRLB states outright there is no reciprocity for contractor registration.
- https://rules.sos.ri.gov/regulations/Part/260-30-15-2 (official, accessed 2026-07-24)
- https://risos-apa-production-public.s3.amazonaws.com/DLT/DLT_2586.pdf (official, accessed 2026-07-24)
South Carolina
State licenseSame sc LLR structure documented for South Carolina's other trades: technical exam per classification plus the SC Business Management & Law exam (never waived), financial statement determining the license group and bid limit.
South Carolina licenses pipefitting under a Mechanical Contractor's license. A reciprocal relationship with North Carolina is cross-confirmed; South Carolina reports agreements with 9 states overall, but whether they cover the mechanical classification specifically wasn'T confirmed. The SC business and law exam is never waived.
What's actually required: South Carolina reports reciprocity agreements with 9 states generally (per this dataset's SC records), with trade-exam waivers confirmed for Alabama and Georgia on other classifications. The North Carolina relationship is cross-confirmed from NC'S own side. Whether the full 9-state list extends to the MECHANICAL classification specifically wasn't confirmed - consistent with the caution applied to all South Carolina records given its multi-board structure and the MASC-to-CAGC certification transition effective January 2026.
Note: Confirm whether SC's 9-state reciprocity list covers the Mechanical classification specifically.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
- https://llr.sc.gov/res/licensure.aspx (official, accessed 2026-07-24)
South Dakota
State licenseSame State Plumbing Commission structure referenced in the SD plumber entry.
South Dakota licenses pipefitting through its State Plumbing Commission. A reciprocal relationship with Minnesota is cross-confirmed from Minnesota's side; South Dakota'S own complete list wasn't verified. Its 15-state electrical reciprocity is a separate program and doesn'T apply here.
What's actually required: The Minnesota-South Dakota plumbing relationship is cross-confirmed from Minnesota's own official DLI page. South Dakota'S complete outbound acceptance list wasn't independently verified from the State Plumbing Commission'S own materials. Note that South Dakota's electrical reciprocity (15 states) is well documented but administered separately - it does not automatically extend to plumbing/pipefitting.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
- https://www.dli.mn.gov/workers/plumber/plumbing-reciprocity (official, accessed 2026-07-24)
Tennessee
State licenseSame TBLC structure: Qualifying Party exam, financial statement, insurance. $25,000 threshold; Home Improvement license covers $3,000-$24,999 in certain counties.
Tennessee licenses pipefitting through its Board for Licensing Contractors. For mechanical and plumbing trades specifically, the trade-exam waiver list is narrow - only Ohio and South Carolina (commercial) are confirmed, notably fewer than Tennessee's electrical or general-contractor lists.
What's actually required: Confirmed from Tennessee's own Board for Licensing Contractors sources, already documented for TN plumber: for the mechanical/plumbing trades specifically, the waiver list is notably narrower than Tennessee'S electrical or general-contractor lists - only Ohio and South Carolina (commercial) are clearly confirmed. This is a trade-exam waiver only; the license must still be obtained in Tennessee.
- https://support.commerce.tn.gov/hc/en-us/articles/209638117-Reciprocity-Trade-Exam-Waiver-Agreement (official, accessed 2026-07-24)
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
Texas
State licenseSame TSBPE ladder documented for Texas plumbing: registered apprentice -> tradesman -> journeyman -> master, each with supervised hours and an exam.
Texas licenses pipefitters through the plumbing board (TSBPE) - the same license and the same narrow reciprocity already documented for Texas plumbing: Louisiana and Arkansas only.
What's actually required: Since pipefitting runs through the TSBPE plumbing license, the reciprocity already confirmed in the TX plumber entry (Louisiana and Arkansas only, confirmed from TSBPE's own form) applies directly.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
- https://tsbpe.texas.gov/applications-forms/ (official, accessed 2026-07-24)
Utah
State licenseSame DOPL structure documented for Utah's other trades: 25-hour pre-license course for specialty classifications, exams where applicable, general liability insurance ($100,000/$300,000 minimum).
Utah licenses pipefitting through DOPL. Rather than named-state reciprocity, Utah offers a case-by-case endorsement pathway for out-of-state licensees with 1+ year of equivalent licensure; Utah's Business & Law exam is still required.
Why, and what applies instead: This dataset's Utah records document a general DOPL endorsement pathway (1+ year of equivalent out-of-state licensure, still requiring Utah'S Business & Law exam) rather than named-state reciprocity. Utah's electrical reciprocity is genuinely contested - three substantially different accounts were found across sources - so no specific state list is asserted for pipefitting either.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
Vermont
State licensePlumbing contractor licensing through the Division of Fire Safety, referenced in the VT plumber entry.
Vermont licenses pipefitting through its plumbing contractor credential. That program's reciprocity wasn'T confirmed - and Vermont's confirmed electrical reciprocity with New Hampshire and Maine is a separate program that doesn'T automatically apply here.
What applies instead: This dataset's Vermont plumber record left the plumbing reciprocity list unconfirmed. Vermont'S electrical reciprocity with New Hampshire and Maine is confirmed and three-way cross-confirmed, but that's a separate program under the Electricians' Licensing Board - it does not automatically extend to plumbing or pipefitting.
Note: Vermont plumbing/pipefitting reciprocity needs a dedicated follow-up - same open item flagged in this dataset's VT plumber record.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
Virginia
State licenseSame DPOR Tradesman structure documented for Virginia's other trades: 4 years/8,000 hours qualifying experience or an approved apprenticeship, plus exam. A Class A/B/C contractor business license (entry point $1,000) is separately required to contract directly with customers.
Virginia licenses pipefitting through its DPOR Tradesman Program, but pipefitting does not appear on Virginia's official reciprocal-agreements document (which names specific agreements for electrical, HVAC, and plumbing). Treat as no reciprocity unless DPOR confirms otherwise.
Why, and what applies instead: Virginia's official DPOR 'Tradesmen Reciprocal Agreements' document - fetched in full and already documented 'S va electrician, plumber, and HVAC records - enumerates reciprocity by specific trade: electrical (7 jurisdictions), HVAC (Maryland only), and plumbing/gas fitting (WSSC only). Pipefitting does not appear as a named reciprocal trade in that document, so no reciprocity is recorded here.
- https://www.dpor.virginia.gov/sites/default/files/boards/Tradesman/Tradesmen%20reciprocal%20agreements.pdf (official, accessed 2026-07-24)
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
Washington
State licenseSame L&I structure documented for Washington plumbing: plumber trainee -> 8,000 hours supervised experience (at least 4,000 commercial/industrial) -> journey-level exam. Contractor registration has no dollar-value exemption in Washington.
Washington licenses pipefitting through its plumber certification, whose only reciprocity partner is Idaho (journey-level only) - confirmed on L&I's own site. Washington'S contractor registration side has no reciprocity with any state.
What's actually required: Confirmed from Washington L&I's own official page, documented in the WA plumber entry: Washington'S only plumbing reciprocity is with Idaho, for journey-level plumbers only - other specialty certifications are not covered. Other out-of-state plumbers get case-by-case consideration, not a named agreement. Washington's contractor Registration (the business side) has no reciprocity at all.
- https://lni.wa.gov/licensing-permits/plumbing/plumber-certification/ (official, accessed 2026-07-24)
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
West Virginia
State licenseWVCLB: PSI Business & Law exam + trade exam (70%+ each), $2,500 threshold. Note WV does not accept NASCLA for at least some classifications.
West Virginia licenses pipefitting through WVCLB's plumbing/HVAC classifications ($2,500 threshold). A mechanical-trades reciprocal relationship with Ohio is confirmed from Ohio'S own form, which explicitly covers HVAC, refrigeration, and plumbing. West Virginia's complete inbound list wasn'T verified.
What's actually required: The Ohio relationship is documented from Ohio's own OCILB reciprocity form (dico_WV_HVREPL_Reciprocity.pdf), which is unusually specific about mechanical trades - it names HVAC, Refrigeration, and Plumbing and requires original testing in West Virginia (grandfathered or reciprocally-obtained licenses don'T qualify). West Virginia's own complete inbound list for mechanical trades wasn'T independently verified - the same open item flagged in the WV plumber entry.
- https://dam.assets.ohio.gov/image/upload/com.ohio.gov/DICO/OCILB/dico_WV_HVREPL_Reciprocity.pdf (official, accessed 2026-07-24)
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
Wisconsin
State licenseSame DSPS structure: Journeyman plumber requires a 5-year apprenticeship + 576 hours related instruction + exam; Master requires 1,000 hours/year as journeyman for 3+ years. 24 hours CE every 4 years.
Wisconsin has no formal pipefitting/plumbing reciprocity agreements - DSPS runs a case-by-case 'comity' review for comparable out-of-state licenses, but the Wisconsin exam is generally still required. Its narrow electrician reciprocity (Iowa, New Hampshire) is a separate program.
Why, and what applies instead: This dataset's Wisconsin plumber record confirms Wisconsin has no formal state-to-state plumbing reciprocity agreements - DSPS instead runs a case-by-case 'Comity (Out of State)' review (confirmed via an actual DSPS form, #3129) for comparable out-of-state licenses, which still typically requires passing the Wisconsin exam. Wisconsin'S HVAC side likewise has no reciprocity. Wisconsin's electrician reciprocity (Iowa and New Hampshire) is a separate program.
- https://dsps.wi.gov/Credentialing/Trades/fm3129.pdf (official, accessed 2026-07-24)
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)
Wyoming
No state license — local/city licensing onlyThere is no state license for this trade — licensing, where it exists, happens at the city or county level.
Varies by locality. Cheyenne, for example, issues eight contractor license classifications with experience and reference requirements.
Wyoming has no statewide pipefitter license - electrical is the only building trade Wyoming licenses at the state level. Licensing is county/city-level, and there is no state reciprocity because there is no state license.
What applies instead: No state license exists for this trade, so no state reciprocity framework applies. Wyoming's electrical reciprocity is extensive and well documented (16 states for Journeyman, but only Idaho, South Dakota, and Utah for Master) - that program covers electricians only and does not extend to pipefitting.
- https://www.tws.edu/blog/welding/licensing-requirements-for-pipefitters-by-state/ (secondary, accessed 2026-07-24)