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Old 08-30-2016, 11:28 PM   #1
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Continuous Water Drain when using "City Water"

After setting up camp, and taking the family to Six Flags for the day, I came back to find a nice little pond on the passenger side of our 2012 Charleston. I could see water draining from a spout behind the last main storage bay (under the door that is held shut with two cotter pins).

It appears that having the "city" water supply hooked up fills our water tank and then proceeds to overflow. I'm confused as to why I have 2 water fills (one for the tank and one for city water) if the city one fills the tank and then overflows. I turned off the city supply and turned on the water pump, and the "leak" promptly stopped.

What am I missing here? Is there a valve I need to close somewhere? Do I have a more serious problem that needs to be fixed?
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Old 08-30-2016, 11:39 PM   #2
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From what I have read in this forum I believe with the City water hookup there is a check valve to stop the flow into the holding tank.
Sometimes this valve sticks and you have to run the pump a bit to close the check valve then you should be able to use the city water properly.
Or the check valve is just out right pooched.
Try the pump first.

Others should pipe in but I think that's the basic idea.

John
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Old 08-31-2016, 01:37 AM   #3
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Now that I turned the pump on, it keeps going on and off even though no water is in use. Anyone experienced that? I finally turned it off so we could get some sleep.
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Old 08-31-2016, 04:15 AM   #4
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Quote:
Originally Posted by chabbey View Post
Now that I turned the pump on, it keeps going on and off even though no water is in use. Anyone experienced that? I finally turned it off so we could get some sleep.
Most RV water pumps have a "Built In" check valve/diaphragm device that prevents "Backflow"! The cause for fail can be "age/over pressure from the city water supply/debris/or part failer! Some pumps have "Rebuild Kits Available,while others just replace the entire Pump"! If you have the Tools and Skill level most repair or replace pump jobs are a DIY while some require you to be a "Contortionist" in regards to pump Placement! Youroo!!
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Old 08-31-2016, 06:11 AM   #5
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Another thread about this issue recently had the following info about how to "reset" or clear a faulty check valve:

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 08-31-2016, 07:42 AM   #6
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This is one reason I turn water off to my camper when I leave for more then an hour!


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Old 08-31-2016, 09:50 AM   #7
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I had the exact same problem. Turns out that the cap on the low point drain was not tight, causing the leak and the pump to run intermittently. Tightened the cap to stop the leak and problem solved.
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Old 08-31-2016, 02:46 PM   #8
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The two problems confirm that it is the check valve in the water pump:
(1) City water is flowing back through the pump and filling the water tank.
(2) When using water from the tank, the pump cannot hold pressure.
You don't need to replace or repair the pump. You can just leave it alone and insert a new check valve in the pipe after the pump. You can get one for a few dollars at Home Depot or a hardware store.
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Old 08-31-2016, 10:43 PM   #9
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You will find a similar discussion in the Georgetown thread with a procedural solution.

http://www.forestriverforums.com/for....php?p=1292553
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Old 09-23-2016, 11:02 PM   #10
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is the tank fill valve open?
if so water from the city water line will fill the tank until it overflos out the over flow pipe
if left open it will also cycle water from the fresh tank cauing the pump to run continuously

just a thought
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