Good Sam Club Open Roads Forum: City Water is filling/overflowing my freshwater tank
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 > City Water is filling/overflowing my freshwater tank

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dsimonson

Spokane, WA

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Posted: 06/28/20 10:16am Link  |  Quote  |  Print  |  Notify Moderator

I must have a check valve issue, because when I attached city water to my trailer, I noted that it started (slowly) filling up my freshwater tank to the point it overflowed.

I see that I can pretty easily replace the city water check valve, but I don't see where I can start looking for the other check valve - there must be one to prevent this from happening. Any ideas on where I should start looking? I have an APEX ULTRA-LITE - 249RBS.

Thanks!

Dan
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Dan Simonson
Spokane, WA

wnjj

Cornelius, Oregon

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Posted: 06/28/20 10:32am Link  |  Quote  |  Print  |  Notify Moderator

The check valve is part of the water pump itself. Try running some water through your system by using the pump. That may reseat it or let whatever debris through that may be making it leak. If that doesn’t work, it’s fairly simple to take the pump head apart to clean and inspect the diaphragm.

If you are referring to the city check valve at the hose connection that is not the issue. That one prevents pump pressure from pushing water out of that connection when it’s not In use,

Mike134

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Posted: 06/28/20 10:54am Link  |  Quote  |  Print  |  Notify Moderator

wnjj wrote:

The check valve is part of the water pump itself. Try running some water through your system by using the pump. That may reseat it or let whatever debris through that may be making it leak. If that doesn’t work, it’s fairly simple to take the pump head apart to clean and inspect the diaphragm.

If you are referring to the city check valve at the hose connection that is not the issue. That one prevents pump pressure from pushing water out of that connection when it’s not In use,


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dsimonson

Spokane, WA

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Posted: 06/28/20 11:05am Link  |  Quote  |  Print  |  Notify Moderator

Thanks - exactly the tip I needed. So I will check out the pump. I ran it several times trying to investigate this, also to empty some of the water out of my overflowing freshwater tank, so I'm thinking the pump is the issue and I'll take it apart.



wnjj wrote:

The check valve is part of the water pump itself. Try running some water through your system by using the pump. That may reseat it or let whatever debris through that may be making it leak. If that doesn’t work, it’s fairly simple to take the pump head apart to clean and inspect the diaphragm.

If you are referring to the city check valve at the hose connection that is not the issue. That one prevents pump pressure from pushing water out of that connection when it’s not In use,


dougrainer

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Posted: 06/28/20 11:07am Link  |  Quote  |  Print  |  Notify Moderator

Just remove the INLET pipe to the Water Pump. Turn on City Water and you will see water come out of the Inlet of the pump if the Pump check valve is the problem. Doug

dsimonson

Spokane, WA

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Posted: 06/28/20 01:36pm Link  |  Quote  |  Print  |  Notify Moderator

Good point, just got finished doing that. Result: no leak from inlet (fresh water tank to pump) side. Sigh... that would have been an easy fix!

I am flummoxed as to how my freshwater tank could be filling up when the trailer is attached to city water! Perhaps a high water pressure issue, and my home water supply pressure is less than the park water pressure where this happened?

dougrainer wrote:

Just remove the INLET pipe to the Water Pump. Turn on City Water and you will see water come out of the Inlet of the pump if the Pump check valve is the problem. Doug


Lynnmor

Red Lion

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Posted: 06/28/20 01:57pm Link  |  Quote  |  Print  |  Notify Moderator

You may have a fresh water fill valve that is used to fill the tank. That valve may be faulty or not turned completely off.





wa8yxm

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Posted: 06/28/20 04:22pm Link  |  Quote  |  Print  |  Notify Moderator

On many RV's there is a 2nd path to fill the tank from city inlet. A "Quick Fill" (As Damon called it on mine) Valve. this is a common 3-way diverter valve
Turned one way it feeds water to the "Houe" the other way to the tank and half way in between both of 'em (Not supposed to do that) if it's not full stop then it may be letting water into the tank.
If the O-Rings in the valve have failed.. Likewise

Easy fix on most RV's.


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Mbiviano

Denver

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Posted: 06/28/20 05:29pm Link  |  Quote  |  Print  |  Notify Moderator

Turn city water off, then make sure you open all faucets hot and cold side and run water pump to get air completely out. Then shut off and open city water again. There’s some YouTube videos out there on it and worked for me recently when faced with same problem.


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D.E.Bishop

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Posted: 06/28/20 07:00pm Link  |  Quote  |  Print  |  Notify Moderator

If you try all of the suggestions you have received but to no avail, I will offer that you do have a bad check valve. I am making an assumption that all your valves in the correct position. There is really no other possibility and I have experienced it in the past and I have seen at least one other RV that had the same problem.

Let us know what you find.


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