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Author Topic: water tank overflow  (Read 1962 times)

lkaymart

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water tank overflow
« on: May 13, 2014, 02:01:01 PM »
My rockwood popup is sending water out of the overflow when I turn on the pump.  Last month I was using a city water hookup and had no problem. Five days ago, I filled the fresh water tank and water was flowing correctly. The next day the pump kept running with little water coming out the faucet, I heard water running outside and saw that it was coming from a plastic tube which I didn,t even know existed but which I think is an overflow valve. Any ideas lou loibl ohio

Gary RV_Wizard

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Re: water tank overflow
« Reply #1 on: May 13, 2014, 02:18:00 PM »
Your tank does have a combination overflow and vent pipe, but the pump shouldn't be in a position where it could send water out it, even if it failed somehow. The pump sucks water From the tank and pushes it into the piping, so any place it pushes water out must be on the output side and not the tank side. I'm thinking the tube you see is a drain line of some sort, maybe a low point drain for emptying the lines for winter weather. Maybe a cap on that drain line was lost? Does it have threads, or maybe a valve handle of some sort?
Gary
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Gary Brinck
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lumpy75

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Re: water tank overflow
« Reply #2 on: May 13, 2014, 03:35:43 PM »
On my old fold down the shut off for the tank drain was inside the camper. Had to lift the seat up and it was mounted to the floor. Make sure you do not have the same but I would think it would drain pump or not.

lkaymart

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Re: water tank overflow
« Reply #3 on: May 15, 2014, 07:50:08 AM »
I realize that the water is coming from a low point but I don't know why the valve opened and it doesn't seem to close.

d_eggman2

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Re: water tank overflow
« Reply #4 on: May 15, 2014, 08:21:34 AM »
Could it be your city water check valve stuck?

Gary RV_Wizard

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Re: water tank overflow
« Reply #5 on: May 15, 2014, 08:32:06 AM »
Quote
I realize that the water is coming from a low point but I don't know why the valve opened and it doesn't seem to close.

Perhaps broken by some road debris? Or maybe a screw-on cap just vibrated loose while driving?  Such things happen once in awhile. Hard to guess about yours without an on-site inspection. Have you identified whether it has an actual valve, or just a cap? If a valve, does it turn and what happens when it does? Some additional clues might help get an answer...
Gary
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Gary Brinck
Summers: Black Mountain, NC
Home: Ocala National Forest, FL

lkaymart

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Re: water tank overflow
« Reply #6 on: May 16, 2014, 07:43:27 PM »
it was a valve and i stopped the water flow but my pump keeps running and hardly produces any water at the faucet.

Lou Schneider

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Re: water tank overflow
« Reply #7 on: May 16, 2014, 11:18:20 PM »
Did you fill your water tank using the gravity fill on the outside of the rig (where you can insert a hose or funnel) or did you use the valve that fills the tank from the city water connection (the same one that provides city water to your faucets)?

If you used the city water fill, you might have left the valve that fills the tank in the fill position.  This routes water from the pressurized side of the system (at the output of the pump) back to the unpressurized side to fill the tank.

With the valve open you'll never develop pressure on the pump's output as it's just being shunted back to the input.

lkaymart

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Re: water tank overflow
« Reply #8 on: May 17, 2014, 06:10:05 PM »
i usedthe gravity fed port to my fresh water tank.

John From Detroit

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Re: water tank overflow
« Reply #9 on: May 18, 2014, 05:00:38 AM »
The pump can not send water out the overflow.. The over flow is connected to the TOP of the tank, the pump to the bottom, If turning on the pump causes water to flow out of a tube,, Odds are you have eitehr

1: An open low point drain (High probability)
2: A broken pipe (low, very low).
Nothing adds excitement like something that is none of your business
My Home is where I park it.

Gary RV_Wizard

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Re: water tank overflow
« Reply #10 on: May 18, 2014, 06:58:02 AM »
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it was a valve and i stopped the water flow but my pump keeps running and hardly produces any water at the faucet.

If your pump keeps running, it is unable to build enough pressure to reach the shut-off point. That says either (1) the water is being pumped somewhere, or (2) the pump is bad, or (3) the pump is unable to suck enough water in to build pressure. #1 is caused by water going out somewhere through a leak,  back into the fresh tank (if the water system has a tank fill bypass valve). #2 means the pump diaphragm has failed and it simply isn't pumping enough water.  #3 is caused by either a clogged intake screen on the pump or a leak in the pump intake hose, i.e. it is sucking air instead of water.

I would check #3 first - it's a common problem.
Gary
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Gary Brinck
Summers: Black Mountain, NC
Home: Ocala National Forest, FL

 

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