State plumbing guide · IN
Plumbing in Indiana
Indiana licenses plumbers statewide and sets a single plumbing code, one that is older than most states' because it still adopts the 2006 International Plumbing Code. Central Indiana's groundwater-fed water is also among the hardest of any large US city.
- Median home built
- 1977
- Built before 1980
- 53%
- Owner-occupied
- 71%
- Winter
- Regular hard freezes
- General statewide rating
- Plumbing code
- IPC
- City guides
- 2
Housing figures: U.S. Census Bureau, ACS 2024 1-year (B25035, B25034).
Indiana city plumbing guides
How to check a plumber's license in Indiana
Journeyman plumbers and plumbing contractors in Indiana are licensed by the Indiana Plumbing Commission through the Professional Licensing Agency, which offers free online license search and verification. [1]
Indiana's older housing stock
Statewide, the median home was built in 1977 and 53% of homes predate 1980. Homes like that were usually built with copper supply, early plastic (ABS or PVC) drains, some cast iron. The city guides below show how much that varies within the state.
Which plumbing code applies in Indiana
The Indiana Plumbing Code (675 IAC 16-1.4) adopts the 2006 International Plumbing Code (second printing) with Indiana amendments and has been in effect since December 24, 2012. [2]
Seasonal problems to plan for in Indiana
- Winter
- Hard freezes and freeze-thaw cycles; frozen pipes and outdoor faucets.
- Spring
- Heavy rain raises groundwater, so basement seepage, sump pumps and sewer backups become common.
Regions of Indiana
Central Indiana
Indianapolis: very hard water, a large share of pre-1980 homes, and cold winters.
Indiana plumbing questions
How do I check a plumber's license in Indiana?
Use the Indiana Professional Licensing Agency's free Search & Verify tool; plumbers and plumbing contractors are licensed by the Indiana Plumbing Commission.
Which plumbing code applies in Indiana?
The statewide Indiana Plumbing Code, which adopts the 2006 International Plumbing Code with Indiana amendments and has been in effect since December 2012.
Sources (3)
- U.S. Census Bureau, ACS 2024 1-year (B25035, B25034) · checked 2026-10-01
- Indiana Professional Licensing Agency, Plumbing Licensing Information · checked 2026-10-01
- Indiana Department of Homeland Security, Rules of the Fire Prevention and Building Safety Commission · checked 2026-10-01