Plumbing — the plumbing storehouse

What the code actually is, state by state: which plumbing code governs — IPC, UPC, or a state-written code — what the state changed, who licenses the work — each record showing how it was verified, and where it's partial, exactly what would complete it. The plumbing wisdom layer hasn't been built yet: there is no docket and no checker here, and these pages don't pretend otherwise. The forum rooms below are where that layer starts.

Look a state up

Browse all 51 — 50 states and DC · 48 verified, 3 partially verified. A partial record is an honest one: it names its own gap.

The rooms

The plumbing forum rooms — code & adoptions, DWV, water supply & heaters, gas piping, service & repair, business, and the field floor. One forum for the whole house; these are its plumbing rooms.

Poll

The launch poll — the expansion-tank question, argued at every supply-house counter, put to living shops.

Reference only. Compiled from the cited official sources as of the date shown; adoptions and rules change. Confirm with the authority having jurisdiction before designing or permitting work.