Zulu Posted July 6, 2020 Report Share Posted July 6, 2020 Turned my water pump off. Filled up my water tank and left my RV's water intake valve open to the park's system. Then I turned my water pump back on so I have the option of choosing between park water or RV tank water at the flick of a switch. That's worked fine until today. After I while I noticed my RV water pump pumping away, but we weren't using the sink, toilet, washer, etc. When I checked my water tank level, it was two-thirds empty. Where'd the water go? I noticed that when I closed my RV's water intake valve, my water pump stopped. So apparently I had been pumping my water tank into the campground system. I've had this happen at another park when the backflow valve failed on the water spigot I was connected to. However, in that case my water tank emptied on the ground near the spigot. Is this another case of a failed backflow valve? Quote Link to comment Share on other sites More sharing options...
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