Division 22 Plumbing
Detail or Installation Mismatch in Division 22 Plumbing submittals
Short answer
The submitted detail, dimension, anchorage, or installation method differs from what the spec or drawings require. Default grade in Division 22 Plumbing: Fix and Resubmit.
The submitted detail, dimension, anchorage, or installation method differs from what the spec or drawings require. This guide covers how it shows up specifically in Division 22 Plumbing submittals.
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
How severe is it?
Default grade: Fix and Resubmit. Escalates to Blocker when the difference affects a fire-rated, seismic, or structural assembly.
Deviation Check assigns a default per category and escalates or de-escalates based on the spec, always showing its reasoning. See the Division 22 severity rules.
What the PM should do
Stamp the submittal Revise and Resubmit. Mark the deviation, return the relevant spec passage as a redline, and have the sub correct and re-send before fabrication or installation.
Other deviation categories in Division 22
Frequently asked questions
What joining method and pipe material mismatches appear most often in Division 22 Plumbing submittal packages?
Copper joining method swaps are the most common: solder, press-fit ProPress, and brazed connections are not equivalent for all applications, and submitting one where another is required is a mismatch. Pipe material swaps also occur frequently - Type L versus Type M copper, cast iron versus PVC for DWV systems, and CPVC versus PEX for domestic water. Each changes the pressure rating, code acceptance, and long-term performance.
How does a water heater vent type mismatch in a Division 22 Plumbing submittal affect the review outcome?
Direct vent, power vent, and atmospheric draft are not interchangeable. Each requires different flue routing, combustion air sourcing, and clearances. Submitting a power-vent unit where the design shows a direct-vent assembly affects coordination with walls, chases, and the mechanical contractor's rough-in. If the vent type difference also changes a fire-rated or seismic assembly, the deviation escalates from Fix and Resubmit to a Blocker and cannot proceed until the correct unit is documented.
View this page as Markdown for LLMs and note-taking.