Class Code 5183
Workers Comp (NCCI)Plumbing — NOC & Drivers
Plumbing installation, service, and repair not otherwise classified — the standard code for residential and commercial plumbers, including gas fitting in many states.
Operations commonly included
- Plumbing installation, service, and repair
- Gas fitting in most states
- Fixture and water-heater installs
Commonly classified elsewhere
- HVAC work (5537)
- Sprinkler/fire-protection piping (often separate)
- Sewer/utility mains in the street (utility codes)
Real-world example
A shop doing service plumbing and remodels is 5183; its duct crew’s payroll belongs in 5537 — split by timecards.
⚠️ Common audit mistake Blending plumbing and HVAC payroll under one code instead of splitting by records — the audit applies the higher rate to the blend.
State variation: Bureau states differ on gas work and utility piping.
Rated on: Gross payroll, per $100.
Trades that use this code
Related codes
Classification varies by state and carrier — several states use independent bureaus, and carriers file their own GL codes. Confirm your fit with a licensed agent before relying on any code. 🤝