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Old 04-06-2015, 07:30 PM   #1
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Water

i have a 2008 grand junction fifthwheel . when i connect to city water i not only get water through the faucets but it fills the fresh water tank at the same time and overflows the tank. is there a valve or something i should replace. thanks
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Old 04-06-2015, 07:40 PM   #2
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This is just a guess but maybe you have a valve that is not fully turned to 'city water' and is going 50% to the fresh water tank and 50% to the intended faucets.

I have a trailer that is this way. The valve turned one way will bypass the fresh water tank fill and route water to the faucets. I turn that valve and it will fill the fresh water tank. That is why I am thinking you have the same valve set-up.

Make sure the vavle is turned fully to 'city water'.
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Old 04-06-2015, 08:31 PM   #3
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It could also be a bad check valve on the water pump.
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Old 04-06-2015, 10:18 PM   #4
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thanks Tuffr 2 this one has no city water valve
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Old 04-06-2015, 10:20 PM   #5
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thanks drfife, if it was a pump valve would the pump not cycle on and off
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Old 04-06-2015, 10:24 PM   #6
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No, it bleeds past the water pump and fills the fresh water tank.
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Old 04-06-2015, 10:31 PM   #7
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If you have a winterizing suction hose, you could probably open that valve and see if any water comes out--that would probably confirm that the pump is allowing backflow.
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Old 04-07-2015, 05:34 AM   #8
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Is this the 1st camping trip of the season and was the unit winterized? If you do not have the valves that toggle between city water and the fresh water tank then I vote for the check valve in the water pump. Especially if this is the 1st use of the spring.

I have seen valves get stuck after a long freezing cold winter.

Since your fresh water tank is full turn off the city water and use the water in your fresh water tank for a day or two. Than might cause the check valve to free up.

Good luck.
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Old 04-07-2015, 08:15 AM   #9
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It's the pump! Just had the same problem with a new unit. They replaced the pump...problem solved!!!
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Old 04-07-2015, 08:30 PM   #10
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Most likely, it is the check valve. On older units, the check valve was an independent item. On newer models it is built into the pump. Mine had the same issue in late 2011, replaced under warranty and has been fine since. If I had the same problem now w/o the benefit of warranty, I wouldn't spend the money on a replacement pump but just spend $10 on an in-line check valve.
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Old 04-09-2015, 01:03 PM   #11
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water

thanks guys for all reply's ,for some weird reason its quit doin the tank filling thing . maybe valve was stuck or grit in it or something but thanks anyway
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Old 04-11-2015, 03:36 PM   #12
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Cool...I always like problems that fix themselves. Hope that issue does not come back.
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