Boiler, hot water heating and steam fitting contractors in Antioch, CA
5 licenses with the C-4 classification list Antioch (Contra Costa County) as their address with the state, 5 of them active. Active licenses with nothing flagged come first.
- Diablo Boiler & Steam IncC-4 · #530963 Antioch · Contra Costa County Active
- Gagetta Steam FittingC-4 · C-60 · #1131851 Antioch · Contra Costa County Active
- Interlock PlumbingC-4 · C-36 · #1149890 Antioch · Contra Costa County Active
- Marine & Industrial Services IncC-4 · C-36 · #534970 Antioch · Contra Costa County Active
- Precision Valve and Controls LLCC-4 · #1153252 Antioch · Contra Costa County Active
Source: CSLB license file, Nov 8, 2026All trades in Antioch