water tank keeps filling

[phelpo]

my water tank keeps filling when hooked up to city water.  I have replaced the fill valve
twice and that did not help.  Someone told me it was the 12v water pump allowing
water to back fill.  Any ideas.

Phelpo


Edit by John:  changed message icon to Topic Solved

 

[Great Horned Owl]

There should be a check valve it the water pump line. It may be either not functioning, or missing.

Joel

 

[Ned]

It could very well be the pump leaking.  If you can, shut off the water line at the pump, either inlet or outlet, and see if the problem stops.  Most likely the check valve is partially open.

 

[Half Dimes1]

my water tank keeps filling when hooked up to city water.

That happened to me.  It was the internal check valve in the water pump.  Wasn't a fixable part so I went to Lowe's and got a pvc check valve and installed it in the pressure side line from the pump to stop the backflow.  Required a couple of pvc adapter fittings and a couple of hose clamps.  Total investment about $10.

 

[Gary RV_Wizard]

I'll agree with the others. If it's not the fill valve, it has to be the pump check valve.  This is usually self-evident, though. If the pump check valve leaks, the system would not maintain pressure when using the pump instead of city water. The pump would cycle occasionally for no apparent reason.

 

[phelpo]

yep. it was the 12v pump, installed a value ahead of it, and no water.

thanks to all

Phelpo

 

[John Canfield]

Glad you got it fixed!