Dometic RV Water Heater Accessories

What replacement parts fit Dometic / Atwood RV water heaters?

This collection covers the common service parts for Dometic and Atwood (now Dometic) gas, electric, and gas/electric RV water heaters: drain plugs, anode rods, thermostats, ECO switches, gas valves, circuit boards, access doors, and door frames. Confirm your water heater's model number (typically GC6AA-10E, GC10A-4E, GCH10A-4E, or similar) before ordering so the part matches your tank size and ignition type. If you need a complete unit instead of service parts, see our 10 gallon RV water heater collection.

What size water heater plug does an RV use?

Dometic / Atwood aluminum-tank water heaters use a 7/8" nylon drain plug with a 1" hex head. Suburban steel-tank heaters use a 3/4" NPT magnesium or aluminum anode rod, not a plug. Installing the wrong one can damage the tank threads, so match the plug to your specific heater model before swapping.

Do Dometic / Atwood water heaters need an anode rod?

No. Dometic and Atwood RV water heaters have aluminum tanks lined with a porcelain coating, so they use a nylon drain plug instead of a sacrificial anode rod. Anode rods are required only on Suburban and Morryde steel-tank heaters. If you own a Suburban unit, the Camco anode rod is the standard replacement.

How often should water heater service parts be replaced?

Inspect the drain plug O-ring and gasket every season and replace at any sign of cracking or leaks. ECO switches, thermostats, and gas valves are replaced as they fail, usually flagged by no-ignition, no-heat, or fault codes. While the system is open for service, it's a good time to address other off-season tasks: see our RV winterizing kits for pink antifreeze, blow-out plugs, and bypass valves.

Does United RV Parts ship water heater accessories with free shipping?

Yes. Orders over $100 ship free within the contiguous U.S. Small service parts like drain plugs, thermostats, and ECO switches typically ship via standard ground. If you need help confirming the right part for your heater, text or call 817-984-1852 with your model number.