Originally Posted by RVwheels
Has anyone experienced this problem? After sitting empty for four months, went to use the water heater and could get no water out of it. It does fill (bypass value does work correctly) but will not deliver any water. It heats up Ok with either electric or gas. I tried cleaning out by removing the anode rod, disconnecting the hot water line on the rear and "back flushing" with air as well with pressured water. Could get no air nor water into the tank via those methods. Is there a check value not allowing backflow? Would there be some other blockage problem from perhaps sitting dry so long?
Your comments/suggestions would be appreciated.
you don't state the year or model of your rv or if you have a suburban or atwood water heater. you probably have a suburban as the atwood does not use an anode rod.
you can add your rv info to your signature block.
it sounds like you have a check valve problem.
many times the check valves can be taken apart and the spring and seat removed, then reassembled.
the check valves purpose is primarily to keep pink anti freeze out of the water heater when winterizing.
camco brass check valves come in two flavors. the male pn is 882032130, the female is pn 23303. they cost about $9 each.
here is a reference that may help.