I have a 2004 winnebago Journey 36G. I have replaced the check valve behind the water hearer a couple of time. Today while unwinterizing all was going well after flushing the water heater and lines....
Thanks to all the great knowledge on this site--especially the chest of drawers drawer removal. There was another check valve behind the city water panel. A pain to get to and replace--need more bandaids--but the venture was successful and all is flowing like it should. That check valve had come apart. Thanks for giving me the encouragement to forage on!!! Thanks Tom