Gas Fitter Salary 2026:
$58,000 to $92,000 (License Premium)
Updated 18 May 2026 | Sources: BLS OEWS 47-2152 | UA Local pay sheets | ASSE Plumbing Standards
Gas fitting is the highest-yielding specialty endorsement a plumber can carry. The extra license adds roughly $5,000 to $12,000 a year above the plumber median, and the medical-gas tier on top of that adds another 10 to 15 percent. The credential is layered, not parallel: in most states you become a journeyman plumber first, then add the gas endorsement.
Median Annual
$74,000
Top 10% Annual
$112,000+
Hourly (Journeyman)
$32 to $48/hr
Premium vs Plumber
+$5K to $12K
Section 01
What a Gas Fitter Actually Does
A gas fitter installs, alters, repairs, and services piping systems that carry combustible or compressed gases. The scope spans natural gas service from the meter forward, liquefied petroleum (LP) gas from tank or cylinder through distribution piping, and the family of medical gases (oxygen, nitrous oxide, medical air, nitrogen, carbon dioxide, vacuum) found in hospitals, surgery centres, and dental offices. Some jurisdictions also fold high-pressure industrial gas service (acetylene, hydrogen, specialty mixed gases) into the gas fitter category.
In a typical residential context the gas fitter sets the appliance shut-off, runs black iron or CSST (corrugated stainless steel tubing) from the service riser to a water heater, range, dryer, fireplace, or whole-house generator, pressure-tests the system, and signs off the leak test. Commercial work scales up: restaurant cook-line manifolds, rooftop unit gas service, kitchen exhaust-tied makeup-air units, boilers, and large-capacity water heaters all carry gas-fitting components. Industrial work pushes into larger-diameter piping with welded rather than threaded connections.
Medical gas is its own discipline. The piping is brazed copper (Type L medical-grade), the joints are nitrogen-purged during brazing to prevent scale formation, and every system undergoes a documented verification sequence (initial pressure test, standing pressure test, cross-connection test, particulate test, purity test, alarm verification) before being released for clinical use. The verifier is the highest-paid role in the medical-gas chain because the verifier carries professional liability for the system as released.
Most plumbing journeymen do not carry the gas endorsement automatically. In many states, a journeyman plumber must take additional gas-specific OJT hours, sit a separate gas exam, and renew the gas endorsement on its own schedule. This separation is what creates the persistent pay premium: not every plumber can legally do gas work, and the contractors who staff gas-heavy projects bid the labour line accordingly.
Section 02
Pay by State: Gas Fitter Journeyman Annual
Pay tracks the plumber market in each state plus a 8 to 18 percent premium for gas endorsement. The biggest premiums show up in NYC, Boston, and other markets where the master gas fitter is a separately tested credential rather than a simple endorsement.
| State | Journeyman Annual | Premium vs Plumber | Note |
|---|---|---|---|
| Massachusetts | $82,000 - $108,000 | +15% | Separate Master Gas Fitter license required |
| Texas | $64,000 - $86,000 | +10% | Texas Tradesman Plumber-Limited + LP gas endorsement |
| California | $84,000 - $112,000 | +12% | C-36 contractor with gas-specific work-experience |
| Illinois | $92,000 - $124,000 | +10% | UA Local 130 covers gas under journeyman scope |
| New York (NYC) | $108,000 - $148,000 | +18% | Master Gas Fitter is a separate NYC DOB credential |
| Pennsylvania | $70,000 - $96,000 | +12% | City-by-city; Philly requires gas endorsement test |
| Florida | $58,000 - $80,000 | +8% | Florida certifies gas under DBPR contractor licensing |
| Washington | $82,000 - $108,000 | +12% | L&I gas-piping mechanic endorsement separate from PL01 |
Annual bands are journeyman-level, full-time employment, including overtime in markets where it is regular practice. Excludes self-employed contractor income. Premium calculated against the state-level journeyman plumber median in by-state plumber pay.
Section 03
The Four Endorsement Tiers
Within gas fitting there are four pay tiers, ranked by certification difficulty and consequence-of-error.
Natural Gas (NG)
+$3 to $6/hr
Residential + commercial NG line work; appliance hook-up + venting
Most journeymen pursue this; state-board exam adds <12 hours of test prep
Liquefied Petroleum (LP) Gas
+$2 to $5/hr
Propane storage, distribution piping, tank install; common in rural states
Rural + agricultural service plumbers; many states require separate LP card
Medical Gas Verifier / Installer (ASSE 6010 / 6020 / 6030)
+$8 to $15/hr
Oxygen, nitrous, vacuum, medical air for hospitals + dental offices
Hospital construction specialists; high barrier (NITC exam + class hours)
Gas Fitter Master (state-specific)
+$5 to $10/hr base + contractor work
Pulls permits, signs off on gas-system designs, supervises journeymen
Master gas fitter is a separately tested credential in MA, NY, TX, others
The medical-gas tier is the highest barrier. The credential is tested through NITC (National Inspection Testing Certification) with the standard reference being NFPA 99 Health Care Facilities Code. The Installer and Brazer credentials (ASSE 6010 and 6011) carry installer-side liability. The Verifier (ASSE 6030) carries final-sign-off liability and commands the largest premium.
Section 04
Why the Endorsement Pays a Premium
Three structural reasons explain the persistent pay gap between a plumber with a gas endorsement and one without.
First, supply is bottle-necked at the credential. A typical plumber apprentice graduates with limited gas-system OJT hours, and the additional 100 to 300 hours plus a separate exam mean a significant fraction of journeyman plumbers never bother. Contractors bidding gas-heavy work cannot just swap in any journeyman, and that scarcity transmits straight into the wage line.
Second, consequence-of-error is qualitatively different. A water-line failure is a damage event. A gas-line failure can be a fatality event. Insurance carriers price contractor general-liability and umbrella coverage substantially higher for gas-heavy contractors, which gets recovered through bid-line markup, which gets transmitted to wages on the assumption that the fitters carry the higher implicit risk.
Third, the highest-pay sub-specialty (medical gas) is regulated under NFPA 99 with documented verification chains, which means a hospital that fails an oxygen-line installation has both regulatory and litigation exposure. The hospital pays a premium to credentialed verifiers because the verifier is the named professional in the chain-of-custody for the medical-gas installation. That premium flows back down to journeyman fitters working under the verifier.
The combined effect: in markets like Boston, NYC, San Francisco, and Chicago where union density is high and hospital construction is sustained, gas-fitter journeyman packages can exceed master-plumber-without-gas packages by 10 to 15 percent. In hospital-heavy submarkets, the medical-gas verifier credential can move pay another 10 to 15 percent on top of that.
Section 05
How to Add the Gas Endorsement
The path depends on where you already are.
If you are an active journeyman plumber: check your state plumbing board's "endorsements" or "specialty" section. Most states publish a gas-fitter or fuel-gas endorsement track that requires documented gas-specific OJT hours (typically 100 to 500 hours under a master gas fitter or licensed contractor), completion of an approved gas-code class (16 to 40 hours), and passing a state-administered fuel-gas exam. Total elapsed calendar time: 3 to 12 months depending on how quickly you can log the OJT hours on suitable projects. Application fee plus exam fee is usually $150 to $400 in total.
If you are an apprentice plumber: ask your apprenticeship coordinator (JATC for UA Locals, or your contractor's training officer if non-union) about pulling gas-heavy work assignments during the third or fourth year of the apprenticeship. The OJT hours accumulated under a master gas fitter during the apprenticeship typically count toward the gas endorsement application post-journeyman certification, which saves you having to log them separately later.
If you want to pursue medical gas: complete the gas endorsement first, then apply to the ASSE 6010 Installer training (typically 32 to 40 classroom hours plus brazing test). After 1 to 2 years of medical-gas installation work, apply for ASSE 6030 Verifier (the higher-paid credential), which requires additional certifications and a separately graded practical test. The verifier credential is renewed every 3 years and requires continuing education.
If you are in Massachusetts or New York City: the gas fitter is a fully separate license track, not an endorsement. The path runs in parallel with (and overlaps with) the plumber apprenticeship, and the Master Gas Fitter is a separately tested credential distinct from Master Plumber. The Massachusetts Board of State Examiners of Plumbers and Gas Fitters publishes the full credential matrix on its board page.