Back flow in one bay

[Mdbordelon318]

I’m having a problem in one of my bays. When someone is using the high pressure system I’m getting back feed into my tank which causes it to come out the overflow. Still have good pressure (1100-1200). Any ideas? Thank all of y’all for the help with other questions!!! It’s been so helpful.

 

[Greg Pack]

If you have a pressurized cold water rinse there will be a check valve on the bottom of the hot water tank. If that check valve goes bad pressurized cold water can fed into the hot tank when rinse is selected. Find the offending bay and replace that check valve.

 

[Mdbordelon318]

Ok I will check that. But I don’t have a hot water tank.
but thank you !!

 

[MEP001]

Ok I will check that. But I don’t have a hot water tank.
but thank you !!

You have a tank, and you most likely have a solenoid that feeds the pump city pressure on rinse. It's still the same setup without hot water in the tank.