Atwood Mobile 91604 Water Heater Pressure Temperature Relief Valve 1/2" NPT 150 PSI

The Atwood Mobile 91604 is a replacement pressure-temperature (P&T) relief valve for Atwood RV water heaters. Rated at 150 PSI, this safety valve is designed to automatically open and relieve excess pressure or temperature buildup inside the water heater tank, protecting the system from potentially dangerous over-pressure conditions.

This 1/2" NPT valve features a 4" long thermostat probe for installation in the hot water outlet line and includes a manual test lever for routine safety testing. It uses a 1/2" male inlet x 1/2" female outlet configuration with standard pipe thread.

Important Fitment Note: This 1/2" valve applies to Atwood water heater models manufactured before February 2006 and can be identified by its orange thread protector. Units made after February 2006 require the 3/4" valve (Atwood part #90028), identifiable by a red thread protector.

Key Features:

• 150 PSI pressure relief rating
• 1/2" NPT pipe thread connection
• 4" long thermostat probe for hot outlet line installation
• 1/2" male inlet x 1/2" female outlet
• Includes manual test lever for safety verification
• For use with Atwood water heaters manufactured before February 2006 (orange thread protector)
• Direct OEM replacement — Atwood part number 91604

Compatible with a wide range of Atwood electronic and pilot model water heaters including GCH6, GC6A, GC6AA, GH6, G6A, GCH10A, GC10A, G10, GH10, XT Series, and many more models with a 1/2" threaded port.