Marathon Hot water heater drain and access

[truk4u]

Just open the pressure relief valve.

[drivfour]

got it- Thanks to all. In the past on other motor home I put air into city water supply and blew out lines, after draining water heater. then poured rv anti freeze into traps.

[Gil_J]

For Aqua-Hot owners that must winterize, don't rely on blowing the water lines out with air. Water tends to settle in the Aqua-Hot coil. If this copper line burst your repair could be around $10K. Aqua-Hot dies not sell that as a replacement part.