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Old 04-20-2015, 06:03 PM   #1
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Fresh water tank filling when hooked to city H2O.

I have a fresh water tank issue that I'm trying to track down and am wondering if anyone here has had the same issue. I have a 2008 27FB (new to me) that came with a loud and slightly leaky water pump. It was the original pump as it was manufactured in '07.

When hooked up to city water (pump off of course) my fresh water tank was slowly taking on water. I figured that was because the pump had a bad check valve. So to kill two birds I replaced the pump. I'm very happy with the new pump as it's much quieter. I took the opportunity to update the original install to make it as quiet as possible (the line in was hooked directly from PEX to the pump, so I added flexible tubing).

One problem still remains... the fresh water tank is still taking on water when hooked up. It seems much slower, but I don't believe this should be happening. Is there another check valve I should check? Anyone else ever run into this?

Thanks, -Andy
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Old 04-20-2015, 06:08 PM   #2
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You are on the right track, as the pump IS the check valve between the water system and the fresh water tank.

I would think the odds are the valves in your new pump are leaking a little allowing the water to flow back into the tank.

I would try running a tank of water thru the pump and see if that solves the problem. If not, you probably got a defective pump.
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Old 04-20-2015, 06:10 PM   #3
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Yep, the new pump looks like it is defective also. My pump had to be replaced with the same problem early in its life.

Jack
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Old 04-20-2015, 06:13 PM   #4
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Thanks guys. That's unfortunate. I'll run it for a weekend trip and see if it's still behaving that way after using it for a bit.

-Andy
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