Pipefitter licensing in District of Columbia

Nothing to bring — DC licenses no pipefitters. We read the District's complete list of regulated occupations and no fitter appears on it. Three neighbors to keep straight: 'Plumber/Gasfitter' is the plumbing and FUEL-GAS credential (real, required on that scope — and a gasfitter card is never a pipefitting qualification); 'Refrigeration and A/C Mechanic' governs its own comfort scope; and 'STEAM ENGINEER' is a boiler OPERATOR license — accepting one as a fitter credential is the classic operator/installer mix-up.

Nothing pending — no fitter license exists to wait on.

No fitter exam exists. Plumbing-scoped work runs on the Board of Industrial Trades' journeyman/master plumber-gasfitter exams (8,000 hours over four-plus years); steam-plant OPERATION is the steam engineer's world — a different occupation entirely.

No fitter tier. The plumbing side's apprentice license (under direct master supervision) is that trade's lane.

The District is the single jurisdiction — no sub-layer exists.

Plumbing-scoped operations anchor on the licensed Plumbing/Gasfitting Trade Contractor (bonds and a designated DC master). Mechanical work outside the regulated occupations proceeds on business licensure and permits. For hydronic piping jobs, ask DLCP which card — if any — the permit demands; that boundary is the one open question we flag.