Potable water problem

[tooltruckguy]

We have a 2017 Primetime Crusader 295 RST. I partially filled the potable tank before we left home. We’re camped in a park that has water & elec hook ups. The potable water tank is now overflowing through the potable water fill.

Any thoughts on where to start looking for the problem?

[Scrapper]

Your check valve is stuck open. It can be caused by the check valve not seating properly, construction debris in the lines or running your water pump while having the city water on.


1) Turn off the city water.
2) Open a faucet to relieve pressure.
3) Turn on your water pump for a minute or two.
4) Repeat step 3.
5) Shut off faucet, let water pump run until it stops.
6) Shut off water pump.
7) Turn on city water.
8) Drain fresh water tank, not necessary if you mind carrying the extra weight.


You might have to clean the faucet aerator/screen if it is caused by construction debris.

[Hclarkx]

Originally Posted by tooltruckguy

We have a 2017 Primetime Crusader 295 RST. I partially filled the potable tank before we left home. We’re camped in a park that has water & elec hook ups. The potable water tank is now overflowing through the potable water fill.

Any thoughts on where to start looking for the problem?

If Scrapper's solution does not work: Pumps like the common Sureflo 4008 bypass some of their output back to the inlet during use to reduce pump cycling. It's a check valve of sorts but is designed to let excess water flow back into the pump inlet when you are running only a small stream at the faucet. If the "city" water pressure is above this bypass setting the city water will force it's way past the pump into the FW tank. I'd try a pressure reducer in the city water line if you don't already have one. You can buy fixed ones that limit pressure to about 40 psi. This fixed my similar problem.

The pressure reducer is a good thing in any event since one does not need the 60 plus PSI that some campgrounds stressing the RV water system.

[bikendan]

Stuck water pump check valve.

[tooltruckguy]

Thanks for the speedy response. I’ll take a look and find the pump, then check it out.

[rracer5]

Originally Posted by tooltruckguy

Thanks for the speedy response. I’ll take a look and find the pump, then check it out.

Did you solve your issue?

Sometimes just running off the pump for a day (cycling it on & off) will free up the check valve.