Winterizing Atwood Water Heater

Close any valves going into/out off water heater tank (Cold/Hot ----backside of tank)
Open 'Bypass' Valve

Open T&P Relief valve .........
Remove Nylon Drain plug (15/16" Six Point Socket)

Drain/flush tank. Close T&P Relief and hand install Nylon plug
(The quart of water left in bottom of tank will NOT cause issues)

No anode rod because of Atwood's aluminum clad alloy tank
Aftermarket sells them for Atwood....don't buy/use. Waste of money/gimmick

AND do yourself a favor and go out and buy a couple replacement drain plugs to keep on board the RV you'll be needing them.

Those cheap plastic plugs cross thread and the head easily gets stripped from taking it out.

sremsing wrote:
You don't winterize water heater. Drain it, then turn on the water heater bypass. Then you can winterize the plumbing.

The process described above is the method of winterizing a water heater.

What size socket will I need for the drain plug?

facory wrote:
The manufacturer installed a water heater bypass kit. The heater has a plastic drain plug that is hard to get to. I'm thinking that has to be removed to drain the heater.

Bypass the water heater and remove the plastic plug. Leave the plug out for the winter, you can just leave it in the water heater compartment so it doesn't get lost.

You don't winterize water heater. Drain it, then turn on the water heater bypass. Then you can winterize the camper.