Check valve replacement
CHECK VALVE REPLACEMENT on Atwood Water Heater installed in the Crossroads Cruiser.
Since Iíve replaced this check valve 3 times already Iíve decided on a modification. The check valve will be replaced with a hex nipple and a manual valve installed in the plumbing to facilitate winterization and/or isolation on the water heater. Yes, if the heat circuit gets stuck on and the high limit stat fails and this new valve is closed then pressure will build and the pressure relief valve will have to let off pressure and that will allow cool water to enter the water heater but this situation is no different than when the check valve fails closed.
With the electrical circuit breaker and water heater switches OFF as well as the water supply OFF and low point drains open, I carefully opened the water heater pressure relief valve and removed the water heater drain and opened all sink faucets. I took this opportunity to flush the mineral calcium deposits from the water heater with the garden hose reduced to ľĒ tube.
With all of the pipes visibly drained, the check valve was removed and replaced with a hex nipple and a new valve placed in the Water Heater Output plumbing line as follows:
2010 CROSSROADS CRUISER CR31RE
2012 RAM 3500 ST + CHROME