International Code Council / IAPMO
IPC / UPC plumbing codes
The two plumbing code families in common use cover the same field questions: does the drainage fall the right way, is every trap vented, is the pipe supported, and did it hold pressure before anyone covered it.
Adoption varies by jurisdiction — confirm the edition your authority having jurisdiction enforces before you run a walk against it.
What it covers
- Drainage, waste and vent sizing and arrangement
- Slope, cleanouts and accessibility
- Pipe support spacing and protection plates
- Rough-in and final pressure testing
What the evidence looks like
- Slope photographed with a level in frame — a claim of fall is not a fall.
- Test gauge shot with the reading and start time, then again at the end of the hold.
- Protection plates at every notch and bore, photographed before insulation.
Checklists that verify work against IPC / UPC plumbing codes
3 free checklists, each with the photo every item needs before it can be submitted.
Plumbing Rough-inPlumbing rough-in inspection checklistUnderground and in-wall piping, slopes and supports before pressure testing9 items14 photosPlumbing Pre-coverPlumbing pre-cover inspection checklistThe hold-point walk before slabs are poured and walls are closed6 items10 photosPlumbing FinalPlumbing final inspection checklistFixtures, supplies, traps and water heater set and operating before turnover9 items12 photos
Common questions
- What is IPC / UPC plumbing codes?
- Plumbing installation — drainage slope, venting, supports, testing. It is published by the International Code Council / IAPMO. The two plumbing code families in common use cover the same field questions: does the drainage fall the right way, is every trap vented, is the pipe supported, and did it hold pressure before anyone covered it.
- What does IPC / UPC plumbing codes cover?
- Drainage, waste and vent sizing and arrangement; Slope, cleanouts and accessibility; Pipe support spacing and protection plates; Rough-in and final pressure testing.
- What does a field inspection against IPC / UPC plumbing codes look at?
- Slope photographed with a level in frame — a claim of fall is not a fall. Test gauge shot with the reading and start time, then again at the end of the hold. Protection plates at every notch and bore, photographed before insulation.
- Which edition of IPC / UPC plumbing codes applies to my project?
- Adoption varies by jurisdiction — confirm the edition your authority having jurisdiction enforces before you run a walk against it.
- Which checklists verify work against IPC / UPC plumbing codes?
- 3 free checklists in the RTI library reference this family — each listed on this page with the photo evidence every item needs before it can be submitted.
A standard is only met if the evidence exists
RTI holds the submit button until every mandatory item is answered and the photos are attached, then chains the record so it can be proven untouched later.
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