What 5183 covers
- Installing, repairing, and maintaining water, gas, and drainage piping and fixtures.
- The contractor's shop work, such as cutting and preparing pipe.
- In North Carolina's description, underground lawn sprinkler installation with the trenching the same contractor performs, and pump or boiler installations of a domestic or residential nature.
What doesn't belong in 5183
- Automatic fire sprinkler installation.
- Sewer construction and water or gas main construction.
- In New York's description, work outside buildings, since its 5183 applies inside buildings only.
Official titles by state
Each rating bureau publishes its own definition. Titles below are quoted exactly as the bureau publishes them; follow the link for the full official description.
| State | Official title for 5183 | Source |
|---|---|---|
| North Carolina | PLUMBING NOC & DRIVERS | North Carolina bureau lookup |
| Wisconsin | PLUMBING NOC & DRIVERS | Wisconsin bureau: 5183 |
| New York | Plumbing – NOC – All Operations to Completion & Drivers | New York bureau: 5183 |
Codes 5183 is often confused with
What a premium audit looks at
- Invoices separating plumbing from fire sprinkler, sewer, or main work.
- Whether any work is outside buildings, especially in New York.
- Subcontracted trades and their certificates of insurance.
Frequently asked questions
Does class code 5183 cover fire sprinkler installation?
No. Automatic sprinkler installation has its own classification.
Are a plumbing company's drivers included in 5183?
Yes. The title's "& Drivers" means the contractor's drivers are included in the same classification.
Check the official manuals
- NCCI Class Look-Up The official tool for the states where NCCI administers the classification system.
- WCIRB California Classification Search California runs its own classification system; its code numbers don't map one-to-one to NCCI's.
- NYCIRB Classification Digest New York's official classification descriptions.
- WCRB Wisconsin Class Code Lookup Wisconsin's official classification descriptions.
- NCRB North Carolina Class Code Lookup North Carolina's official classification descriptions.
Rates aren't listed here on purpose. Class code rates and loss costs change by state, by carrier, and every year, so check the current figures with NCCI's Class Look-Up or your state's rating bureau (linked above), and with your own carrier for the rate on your policy.
Related terms
General information, not a classification ruling. Summaries on this page are written in plain English from the bureaus' published descriptions; the classification manual for the state where the work was performed governs, and the carrier and rating bureau determine the classification for any policy.
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