Indiana (IN) Plumbing Code & Permit Rules
Indiana Plumbing Code (based on IPC) (2020) · Updated 2026-05-31
Data: State plumbing boards, ICC, IAPMO, EPA Last verified: 2026-05-31
Indiana requires licensed plumbers for most plumbing work and mandates annual backflow testing. These regulations help protect water quality but mean higher costs for homeowners compared to states that allow DIY work.
Plumbing Code
Indiana follows the Indiana Plumbing Code (based on IPC) (2020 edition).
Key Regulations
| Regulation | Status | Details |
|---|---|---|
| Plumbing Code | IPC (2020) | Indiana Plumbing Code (based on IPC) |
| Homeowner DIY | Not allowed | Licensed plumber required |
| Water Heater Permit | Required | |
| Backflow Testing | Annual, required | |
| Seismic Strapping | Not required | Water heater restraint |
DIY Plumbing in Indiana
Indiana requires a licensed plumber for most plumbing work. Licensed plumber required
While this increases costs, it ensures:
- Work meets current code requirements
- Proper permitting and inspection
- Warranty and liability protection
- Safe connections to water and sewer systems
Backflow Prevention
Indiana requires annual backflow testing to protect the public water supply from contamination. Testing must be performed by a Certified tester.
Non-compliance penalty: Water service may be shut off if testing is not completed on schedule.
Water Conservation Requirements
Indiana follows federal water conservation standards. Federal minimums apply
Lead Service Line Replacement
Indiana has an active lead service line replacement program. Following EPA Lead and Copper Rule 2021
Data Sources
- Indiana state plumbing board and licensing agency
- International Code Council (ICC)
- IAPMO
- EPA Safe Drinking Water Act
Updated as regulations change.
Need a licensed plumber in Indiana?
Plumbing regulations vary by city. Connect with a licensed professional who knows your local code requirements.
Find a Licensed Plumber →Frequently Asked Questions
What plumbing code does Indiana follow?
Indiana follows the Indiana Plumbing Code (based on IPC) (2020 edition).
Can I do my own plumbing work in Indiana?
No, Indiana requires a licensed plumber for most plumbing work.
Do I need a permit to replace a water heater in Indiana?
Yes, Indiana requires a permit for water heater replacement. A licensed plumber is required for the installation.
Is backflow testing required in Indiana?
Yes, Indiana requires annual backflow testing.
Does Indiana require seismic strapping for water heaters?
No, Indiana does not require seismic strapping for water heaters. However, they remain a prudent option in areas with seismic activity.