Wyoming (WY) Plumbing Code & Permit Rules
International Plumbing Code (2018) · Updated 2026-05-31
Data: State plumbing boards, ICC, IAPMO, EPA Last verified: 2026-05-31
Wyoming allows homeowner DIY plumbing with permits, though annual backflow testing is still required. This balanced approach gives homeowners flexibility while maintaining water quality standards.
Plumbing Code
Wyoming follows the International Plumbing Code (2018 edition).
Key Regulations
| Regulation | Status | Details |
|---|---|---|
| Plumbing Code | IPC (2018) | International Plumbing Code |
| Homeowner DIY | Allowed | Permissive for primary residence |
| Water Heater Permit | Required | Permissive for primary residence |
| Backflow Testing | Annual, required | |
| Seismic Strapping | Not required | Water heater restraint |
DIY Plumbing in Wyoming
Wyoming allows homeowners to perform plumbing work on their primary residence. A permit is required for most work beyond minor repairs.
Common DIY-allowed projects (with permit):
- Replacing faucets and fixtures
- Installing shut-off valves
- Replacing toilet components
- Minor drain repairs
Projects that typically require a licensed plumber:
- New water line installation
- Sewer line repair or replacement
- Gas line connections
- Backflow preventer installation
Backflow Prevention
Wyoming requires annual backflow testing to protect the public water supply from contamination. Testing must be performed by a Certified tester.
Water Conservation Requirements
Wyoming follows federal water conservation standards. Federal minimums apply
Lead Service Line Replacement
Wyoming has an active lead service line replacement program. Following EPA Lead and Copper Rule 2021
Data Sources
- Wyoming 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 Wyoming?
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 Wyoming follow?
Wyoming follows the International Plumbing Code (2018 edition).
Can I do my own plumbing work in Wyoming?
Yes, homeowners in Wyoming can perform plumbing work on their primary residence with proper permits.
Do I need a permit to replace a water heater in Wyoming?
Yes, Wyoming requires a permit for water heater replacement. Homeowners may be able to do the work themselves with a permit.
Is backflow testing required in Wyoming?
Yes, Wyoming requires annual backflow testing.
Does Wyoming require seismic strapping for water heaters?
No, Wyoming does not require seismic strapping for water heaters. However, they remain a prudent option in areas with seismic activity.