# Detail or Installation Mismatch in Division 22 Plumbing submittals

> Source: https://deviationcheck.com/divisions/22-plumbing/detail-installation-mismatch/

The submitted detail, dimension, anchorage, or installation method differs from what the spec or drawings require.

## What to look for in Division 22 Plumbing

- **Pipe material** mismatch (Type L vs Type M copper, cast iron vs PVC for DWV, CPVC vs PEX for domestic water)
- **Joining method** differs (solder vs press-fit/ProPress vs brazed for copper; hub vs no-hub for cast iron; solvent weld vs mechanical for PVC)
- **Pipe size** differs from design drawings
- **Water heater vent type** (direct vent vs power vent vs atmospheric draft)
- **Trap size** differs from code minimum
- **Fixture rough-in dimensions** differ (affects coordination with walls and structure)
- **Valve type** differs (gate vs ball vs butterfly, full port vs standard)
- **Expansion tank** size or pre-charge pressure differs
- **Insulation type or thickness** for hot water piping differs
- **Floor drain body type** (adjustable vs fixed, sediment bucket vs open)
- **Water hammer arrestor** location or sizing differs
- **Mixing valve type** (thermostatic vs pressure-balancing vs combination)
- **Domestic water booster pump** type or capacity differs

## Severity

Default grade: Fix and Resubmit. Escalates to Blocker when the difference affects a fire-rated, seismic, or structural assembly.