Atwood Mobile 90028 Water Heater Pressure-Temperature Relief Valve 3/4-14 NPT 150 PSI

The Atwood Mobile 90028 is an OEM pressure-temperature (P/T) relief valve engineered as a direct replacement for Atwood and Dometic RV water heaters. Featuring a 3/4-14 NPT thread connection and a factory-set relief pressure of 150 PSI, this valve is a critical safety component that protects your water heater tank and surrounding plumbing from dangerous over-pressurization.

When internal tank pressure exceeds the rated threshold, the valve automatically opens to safely vent excess pressure—then reseats once conditions normalize. Replacing a faulty or weeping P/T relief valve is essential preventive maintenance that helps avoid costly water heater damage.

Key Features:

• Factory-set relief pressure: 150 PSI
• Thread size: 3/4-14 NPT
• OEM replacement for Atwood / Dometic RV water heaters
• Automatic pressure-relieving operation for passive safety protection
• Direct fit for electric and combination gas/electric Atwood water heater models

Compatible Atwood Water Heater Models Include:

• GCH66E, GCH67E, GCH68E
• G6A6E, G6A7E, G6A8E
• G10-2E, G10-3E
• GH102E, GH103E
• GCH6A10E, GC6AA10E
• GC10A4E, GCH10A4E
• Most other Atwood models equipped with a 3/4 NPT relief valve

Sold as a single replacement valve. This is a genuine Atwood Mobile Products part (now sold under the Dometic brand) and the correct OEM service kit component for 3/4-inch NPT-equipped units.