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Old 05-28-2019, 05:43 PM   #1
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City water fills fresh water tank

Question here. I am hooked to city water which works fine but somehow It keeps filling my fresh water tank even though the switch is on city water only. Any help please
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Old 05-28-2019, 06:07 PM   #2
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they need to change the name of this forum to "fresh tank fills when on city water" the most common thread other then tow weights. Your check valve in your water pump is stuck open. turn off your city water. run the water pump and it should fix itself.
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Old 05-28-2019, 06:14 PM   #3
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Very common. You may need to reset the back flow valve.


Turn off city water
Run water until it stops
Turn on water pump
Open any faucet for a minute
shut off faucet
Once pump stops turn off pump
turn on city water


Do not run water pump when using city water.
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Old 05-28-2019, 06:19 PM   #4
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Use the search function and you'll find a new thread every week that describes this problem.

Resetting the check valve in the water pump usually works until you run the pump while city water is connected.

Adding an inline check valve on the input to your water pump is a permanent fix.
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Old 05-28-2019, 06:21 PM   #5
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Do you happen to have the Anderson Kantleak set-up as mentioned in the following thread? It MAY require a different solution.

http://www.forestriverforums.com/for...wn-184872.html
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Old 05-28-2019, 07:23 PM   #6
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Thank you all for the responses. Disconnected city water. Then ran water pump as suggested. Now waiting to see if problem was resolved. Thanks again for all responses
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Old 05-28-2019, 07:31 PM   #7
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Thank you all for the responses. Disconnected city water. Then ran water pump as suggested. Now waiting to see if problem was resolved. Thanks again for all responses
Enjoy your evening. You'll know by morning.
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Old 05-29-2019, 01:19 PM   #8
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Fresh water tank fills on city water

Will this complaint never stop? Are water pumps getting worse? 99% chance your pump is allowing pressurized city water to backfill the tank. This is probably the biggest complaint of new people to the forum. Easiest solution...get a new pump. They are easy to install.
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Old 05-29-2019, 01:47 PM   #9
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Also, too high city water pressure can overcome a perfectly good check valve in the pump.

Make sure you are using a quality water pressure regulator.
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Old 05-29-2019, 04:13 PM   #10
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Will this complaint never stop? Are water pumps getting worse? 99% chance your pump is allowing pressurized city water to backfill the tank. This is probably the biggest complaint of new people to the forum. Easiest solution...get a new pump. They are easy to install.
Cheaper to install check valve on pump inlet. A fraction of the cost and a new pump is no guarantee the problem won't resurface.
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Old 05-30-2019, 06:23 PM   #11
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Cheaper to install check valve on pump inlet. A fraction of the cost and a new pump is no guarantee the problem won't resurface.
X2
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