Boiler, hot water heating and steam fitting contractors in Vallejo, CA

6 licenses with the C-4 classification list Vallejo (Solano County) as their address with the state, 5 of them active. Active licenses with nothing flagged come first.

• ✓Bobbie Knowles PlumbingC-4 · C-20 · C-36 · #1018989 Vallejo · Solano County Active
• ✓Custom Valve Solutions IncC-4 · #1031736 Vallejo · Solano County Active
• ✓Dormatech Mechanical Systems IncC-4 · C-20 · #1005012 Vallejo · Solano County Active
• ✓Warm Corporation WestB · C-4 · #605577 Vallejo · Solano County Active
• ✓Warm FloorsC-4 · #1153885 Vallejo · Solano County Active
• !Checkmate Mechanical LLCC-4 · #1146400 Vallejo · Solano County Suspended: liability insurance lapsed

Source: CSLB license file, Nov 8, 2026All trades in Vallejo