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Old 11-10-2018, 07:17 PM   #1
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Fresh water tank

I have never heard this one before, so here is the mystery. I was walking into our 2018 Forest river forested 3150 tonight and as I passed by the fresh water intake, I noticed water coming out, I opened the cap and more water came out, went inside to check the monitor and a tank that had been 80 % full was now 100% full and leaking excess water out of the intake. Okay guys, please tell me how this could even be possible?
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Old 11-10-2018, 07:27 PM   #2
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Common issue discussed here hundreds of times.

The check valve on the water pump likely is stuck partially open or may have some debris in it.

Also too high city water pressure can overcome the check valve. Are you using a regulator?

Turn off city water and relieve pressure by opening a faucet. Turn on pump and cycle several times by opening and closing a faucet. Turn off pump and turn on city water and see if flow stops.

The sole purpose of the check valve is to prevent exactly what is happening as you describe.
The check valve is built into the pump to keep city water from back flowing into the fresh tank since near the on- board pump, the city water and the output of the pump are tied together in a R/V water system.
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Old 11-10-2018, 07:41 PM   #3
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Quote:
Originally Posted by 5picker View Post
Common issue discussed here hundreds of times.

The check valve on the water pump likely is stuck partially open or may have some debris in it.

Also too high city water pressure can overcome the check valve. Are you using a regulator?

Turn off city water and relieve pressure by opening a faucet. Turn on pump and cycle several times by opening and closing a faucet. Turn off pump and turn on city water and see if flow stops.

The sole purpose of the check valve is to prevent exactly what is happening as you describe.
The check valve is built into the pump to keep city water from back flowing into the fresh tank since near the on- board pump, the city water and the output of the pump are tied together in a R/V water system.
Thanks, we do have a regulator, we will try the a solution you suggested
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Old 11-10-2018, 09:13 PM   #4
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Procedure to clear contaminated check valve published in another thread.

Turn off city water
Turn off water pump if on.
Turn on any faucet wait 1 min
Turn on water pump
let water run 1 min
Turn off faucet
turn off water pump
Wait for water pump to quit running
Turn on city water
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Old 11-14-2018, 06:18 PM   #5
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So we did the thing with turning off the water and draining the faucets then running the pump and it seems the problem is sober!

Our thanks to everyone for suggestions !
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Old 11-15-2018, 10:59 AM   #6
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Thanks for coming back and letting us know that you got it fixed. I'm glad that it was as simple as jogging the pump to clear the check valve.
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