Fresh tank filling on its own????

[360true]

Weird one. Looking for my GT buddies for help! When hooked up to city water, my fresh tanks fills slowly to overflow. Takes about 24 hours to completely fill. And no, my city hose is not connected to the fresh fill.... Lol.

I have a 2014 378....

Standing by...
Paul

[jimpacker]

I had the same problem, check valve in water pump will allows city water to pass through. Turn off city water, turn on water pump allow pressure to build up untill pump shuts off. Turn city water back on and turn off water pump.
I found if I turned on city water without pressurizing the system it woul fill up my tank.

[wvphil]

Same problem. I added an external check valve on input side of water pump. Much cheaper than replacing pump and much less work than rebuilding pump and replacing internal check valve. Mine originally cleared when doing as suggested in previous post but started sticking again a couple days after hooking back up to city water.

[360true]

Thanks! Will give it a try and let ya'll know. Everytime I think one of these things ONLY happens to me, I am relieved that we ALL suffer the same issues!

[360true]

Tried the procedural fix. Seemed to work, but overnight started leaking again, filling the tank and dripping overflow. My temp solution is to turn off city water and use the fresh tank, refilling as necessary until I can get the pump replaced under extended warranty.

[Teamfour]

Originally Posted by 360true

Tried the procedural fix. Seemed to work, but overnight started leaking again, filling the tank and dripping overflow. My temp solution is to turn off city water and use the fresh tank, refilling as necessary until I can get the pump replaced under extended warranty.

The pump doesn't need replacing, just the valve cleaned or replaced. I had the same issue and eventually installed a ball valve in the output from the pump to the main water line. This prevents the city water from backflowing through the pump into the fresh water tank. We rarely use the fresh water tank, but if we need to I can easily open the ball valve from under the kitchen sink.

[360true]

Great to hear. Where is the actual valve? Inside black pump cover or ??

[Teamfour]

The check valve is in the pump housing. Pain to keep cleaning. Thus the ball valve.

[raytwntrvlr]

I have had the same issue a few times... may do the ball valve mod if it comes back.

[jrmorris]

Had the same problem. Since I was still under warranty I had the pump replaced. No problem since. The new pumps can have crud in them from the manufacture and plug the check valve causing water to flow into the fresh water tank.

[Flybob]

Originally Posted by 360true

Tried the procedural fix. Seemed to work, but overnight started leaking again, filling the tank and dripping overflow. My temp solution is to turn off city water and use the fresh tank, refilling as necessary until I can get the pump replaced under extended warranty.

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

This reseats the check valve in the water pump. Do not run the water pump when connected to city water.

[360true]

Trying that now. Will let y'all know. Thanks for all the suggestions!

[DouglasReid]

Instead of replacing the pump which is expensive, or replacing the check valve in the pump which is a pain in the a__, or even a ball valve which requires you to take some action (opening it up) when you want to use the tank water, why not spend $10.00 for a 1-way check valve that will fit inline in the pex tubing.

They are available at Home Depot, Lowes or any other home improvement store, or any plumbing supply house, not to mention Amazon, eBay and other online sellers.

Fast, Easy and Cheap Permanent solution.

[5nomads]

I have the same problem with mine. For me the solution is to simply turn off the pumps when hooked up to city supply. No issues like for me.

[Flybob]

Originally Posted by 360true

Trying that now. Will let y'all know. Thanks for all the suggestions!

Did it work?

[5picker]

Originally Posted by 5nomads

I have the same problem with mine. For me the solution is to simply turn off the pumps when hooked up to city supply. No issues like for me.

Unless you are in a situation where the city water supply pressure is tremendously low (think 8-10 campers hooked to one line at a rally) your pump SHOULD ALWAYS BE OFF when hooked to city water.

[360true]

Flybob.... Worked thanks! Followed your steps exactly. So far so good.

5nomads... Note the issue occurred for me with the pump off and hooked up to city.

[Iggy]

Originally Posted by 5nomads

I have the same problem with mine. For me the solution is to simply turn off the pumps when hooked up to city supply. No issues like for me.

X2