# Manufacturer or Product Substitution in Division 33 Utilities submittals

> Source: https://deviationcheck.com/divisions/33-utilities/manufacturer-substitution/

The submittal proposes a different manufacturer or product than the spec names, without an approved or-equal or substitution request.

## What to look for in Division 33 Utilities

Utility specs often name specific manufacturers or approved product lists maintained by the local utility district. Look for:
- Pipe manufacturer substitutions (Hanson, CertainTeed, JM Eagle, Diamond Plastics, ISCO) where local district maintains an approved product list
- Precast manhole and structure manufacturer swaps (Oldcastle, Jensen Precast, Forterra) - concrete mix and reinforcing must still meet ASTM C478
- Fire hydrant manufacturer changes (Mueller, American Flow Control, Waterous, Kennedy) where district requires a specific brand for parts interchangeability
- Gate valve and butterfly valve manufacturer substitutions where operating nut size or end connection differs from district standard
- Fitting manufacturer changes (Tyler Union, Star, EBAA) especially for restrained joints where deflection angle ratings vary
- HDPE pipe manufacturer substitutions (Advanced Drainage Systems, CONTECH, Prinsco) where corrugation profile affects pipe stiffness

## Severity

Default grade: Blocker. Drops to a Note if the submittal attaches an or-equal approval letter from the architect of record.