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Old 11-04-2015, 10:54 AM   #1
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Water Leak???

For a couple of months now I have had problems with my fresh water supply. The water pressure from the campground connection shows 50psi but the pressure at my faucets is much lower. I cannot put a gage on the faucets but it just does not come out very fast.

I am not sure if it is related but I also have found that my fresh water tank fills to overflowing whenever I am connected to city water. I have checked the fill valve and it is shutoff. I cannot find any other path for the water can go from the water fill hose to the tank except through the water fill valve. I have turned this valve several times you can hear when the water turns on and hear and feel when you have shut the water tank fill off. It appears to be working as designed.

Is anyone familiar with this system? Can water seep around this shutoff valve and leak into the tank? Do you think my lack of coach water pressure is related? I have looked everywhere for a leak, I cannot find a water leak anywhere in my coach nothing is wet anywhere that it should not be.
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Old 11-04-2015, 11:23 AM   #2
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This brings up an interesting question - is there a anti-backflow device somewhere in line? Maybe integral to the 12v pump? Because (without sketching it out) it seems you'd have to have one. When connected to city water, the pump output side would be pressurized by the city supply. If there wasn't a "one-way" valve, wouldn't city water backfill the fresh water tank via the pump plumbing?
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Old 11-04-2015, 11:58 AM   #3
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Yes, and a failure in the pump can allow the fresh water tank to fill. Don't ask how I know!


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Old 11-04-2015, 12:28 PM   #4
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Yes, and a failure in the pump can allow the fresh water tank to fill. Don't ask how I know!


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+1
The check valve on water pumps are notorious for failing this way. A shut-off valve in the line from the fresh water tank to the pump will eliminate this problem. You just have to remember to turn the valve "on" when you disconnect from city water so you can wash and flush with the pump while running down the road or boondocking.


This, however, may not be the reason for you low flow issue. Check for crimped hose lines, clean out the aerators on the faucets, change your water filter if you have one being sure that you are using the correct filter. Smaller than .5 microns will start to reduce flow in an RV system.
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Old 11-04-2015, 05:56 PM   #5
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[ATTACH]111164[/ATTACH
I installed a new pump and shortly after I had that same issue. Went to Home Depot and bought a better check valve and installed it between the screen and pump. About $15 to fix this.


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Old 11-05-2015, 07:46 AM   #6
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Thank you all. I am traveling today but will take a look for a check valve and or a shutoff valve.

If the pump has failed or allowing water to bypass why would it still work when city water is not hooked up?

I replaced the pump a little over a year ago when it just stopped working, hate to think the 16 month old pump has failed already, we have had a lot of costly repairs this year the money tree is getting bare.
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Old 11-05-2015, 07:52 AM   #7
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I've never had one of these pumps apart (yet), however I can easily imagine that a leaky integral check valve wouldn't necessarily impair the pump's ability to pump water "forward" when called upon. Essentially they would be two separate functions / components within one housing.
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Old 11-05-2015, 09:34 AM   #8
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Your city/tank fill could be leaking internally. I had that happen. I took the works out of the valve and replaced an o-ring. It was very easy and only took about 10 minutes.
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Old 11-06-2015, 12:50 PM   #9
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Your city/tank fill could be leaking internally. I had that happen. I took the works out of the valve and replaced an o-ring. It was very easy and only took about 10 minutes.
ChasA can you give me a little insight in how you did this repair? My first thought was that it was this valve, however when turned on and off it sounds like it is working correctly.

Johndale and firedoc Where is the check valve located? Inside the pump? Johndale How did you add the check-valve in your picture?

Here is a picture of my water-pump. The pencil shows the direction of the water flow according to arrows on the pump. If I understand you I should add a one-way check valve to the right side of my pump to prevent water flowing to the left into the pump. Am I on the right track?

FYI I have fixed the internal pressure problem I mentioned. I found the inlet screen in my pressure regulator was clogged. I replaced the screen and water filter at my water inlet and the coach water pressure is back to normal. Thank you all for your help with that issue.
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Old 11-06-2015, 04:10 PM   #10
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The check valve is inside the pump. If your pressure is back up and system holds pressure and pump does not cycle when power is on and all fixtures is off you are good. The check valve I installed was between the pump and screen. The selector valve on mine is held on with screws but every RV is different. If you look behind the panel you will see the water lines in the valve remove them from valve. Some has 2 lines and some has 3.


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Old 11-07-2015, 12:31 AM   #11
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[ATTACH]111164[/ATTACH
I installed a new pump and shortly after I had that same issue. Went to Home Depot and bought a better check valve and installed it between the screen and pump. About $15 to fix this.


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Wow, is that a lead fitting from your pump?


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Old 11-07-2015, 08:59 AM   #12
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Wow, is that a lead fitting from your pump?


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No it is not even close. Mine is all water safe. What you see is the thread sealer.


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Old 11-07-2015, 01:09 PM   #13
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There is also a check valve inline after the hot water tank.
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Old 11-07-2015, 06:30 PM   #14
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CPO,
I popped the handle off, unscrewed the bonnet, and the innards came right out. I rooted through my assortment of o-rings and found one the right size and replaced the bad one. Keep in mind your valve could be different. But there is a good possibility they're the same since we both have Winnebago products.
On mine the handle just snaps on/off. Hopefully yours is the same.
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