Atwood / Dometic G6A-8E
Pressure & Temperature Relief Valve · diagram item 3
The G6A-8E parts list identifies item 3 as 1/2-inch relief valve 91604.
Model reference sourcePermanent RV part identity
Atwood 91604 Pressure & Temperature Relief Valve
Atwood / Dometic Part 91604
Atwood / Dometic 91604: Relieves excessive water-heater tank pressure or temperature as a safety function. Review manufacturer model references and current supplier availability on RVPartScan.
Also called: P/T relief valve, pressure relief valve, temperature relief valve
Manufacturer part referenceReplacement part2 recently verified listings2 suppliers with recorded evidenceLast checked Oct 14, 2026
Manufacturer model evidence
Models that reference this part number
Atwood / Dometic GC10A-4E
Pressure & Temperature Relief Valve · diagram item 30
Service references show 91604 for the 1/2-inch valve and 90028 for the 3/4-inch version. Verify the installed fitting size before ordering.
Model reference sourceAtwood / Dometic GC6AA-10E
Pressure & Temperature Relief Valve · diagram item 30
The GC6AA-10E parts list identifies item 30 as 91604 for the 1/2-inch fitting. Some installations use the 3/4-inch 90028 valve, so verify fitting size.
Model reference sourceAtwood / Dometic GCH10A-4E
Pressure & Temperature Relief Valve · diagram item 30
Service references show 91604 for the 1/2-inch valve and 90028 for the 3/4-inch version. Verify the installed fitting size before ordering.
Model reference sourceSupplier evidence
Availability observations for 91604
Supplier availability is observational data. It can disappear or become stale without changing this permanent part identity.
Panther RV ProductsRecently verifiedChecked Oct 14, 2026
Dometic™ Atwood 91604 Water Heater Pressure Relief Valve - 150 PSI - 1/2" NPT Thread
Condition: Not specified by supplier
$36.99
SupplierDyers RVRecently verifiedChecked Oct 14, 2026
Atwood Water Heater Pressure Temperature 1/2" Relief Valve
Condition: Not specified by supplier
$49.38
SupplierConfirm the part number, model and source documents before ordering. Check final price, condition and availability with the supplier.