# Detail or Installation Mismatch in Division 21 Fire Suppression submittals

> Source: https://deviationcheck.com/divisions/21-fire-suppression/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 21 Fire Suppression

- **Sprinkler head orientation** (upright vs pendant vs sidewall) differs from drawings
- **Sprinkler head type** (concealed vs recessed vs flush vs exposed) differs
- **Pipe material** mismatch (Schedule 40 vs Schedule 10 vs CPVC, black steel vs galvanized)
- **Pipe joining method** differs (threaded vs grooved/Victaulic vs welded vs CPVC solvent)
- **Hanger type or spacing** exceeds NFPA 13 maximum
- **Seismic bracing** type, spacing, or load rating differs
- **Valve location** differs from riser diagram
- **Standpipe connection size** differs (2.5" vs 1.5" hose connection)
- **Fire department connection (FDC)** type, size, or location differs
- **Alarm device type or location** differs (waterflow switch, tamper switch, pressure switch)
- **Pipe size** at specific locations differs from hydraulic calculations
- **Drain and test connection** locations differ

## Severity

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