Not sure how your coach is plumed but on my coach water gets into the freshwater tank by bypassing the water pump. If that is the case, you have three options: replace the pump, replace the valve system on the pump or put one way valve in the line just after the pump. I chose the last option as the most sure fix, plus I already had all the PEX fittings and tools.
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Jim & Roy Davis
2016 Hurricane 31S
1961 Rampside in tow
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