MOD Water pump upgrade with accumulator tank

[Neal]

Thanks. I have a valterra check valve coming I'm going to put prior to the pump input line. I'll inspect tomorrow to see if I can figure out where the existing check valve is, if any. This should fix the issue to keep the water flow only going into the pump and not back from the accumulator pressure.

Amazon.com

 

[flyboy013]

@Neal - See this post and the ones following it. I had same issue this past summer. The check valve is behind the panel and up high. You can fill for it and change it without taking panel off. I also creating a flow diagram which may help.