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Plumbing Rough-In Inspection Certificate
A Plumbing Rough-In Inspection Certificate documents the inspection of plumbing supply and drain/waste/vent (DWV) piping before walls and floors are closed. It verifies proper pipe sizing, materials, slope, venting, and successful water/air pressure testing.
UPC (Uniform Plumbing Code) or IPC (International Plumbing Code), state/local plumbing codesValid: One-off (no expiry)
What it covers
- Supply and DWV pipe materials and sizing
- Water pressure test results
- Vent system adequacy
- Cleanout locations
- Fixture count and layout
Who needs a Plumbing Rough-In?
General contractors
Plumbers
Building inspectors
Homeowners (for records)
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Frequently asked questions about Plumbing Rough-In
What does a plumbing rough-in inspection cover?
The inspector checks all supply and drain piping before it is concealed. This includes pipe sizing, materials, supports, slope on drain lines, vent connections, cleanout access, and a water or air pressure test to verify no leaks.
What is the pressure test requirement?
Requirements vary by code. The UPC typically requires a water test (filling the system with water to the highest vent) or an air test at 5 PSI for 15 minutes. The IPC allows similar methods. Check your local jurisdiction.
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