Presoak distribution issue..

[spf8298]

In our 3 self serve bays, the presoak is distributed to the bays via a booster pump, 1 solenoid valve for each bay, and 3/8” poly line to each bay. For some I get presoak coming out of the middle bay anytime I turn on the left or right bay. I’ve swapped out the middle bay dema valve thinking it may have been stuck open, but the issue persists.

I know it has to be a simple fix, but I’m stumped. Can anyone offer me any other troubleshooting options? I feel like an idiot not being able to correct this issue. Carwashes can be puzzling.

 

[Big Chris]

I'd test to see if there was power at the middle bay's solenoid valve when the left or right bay is turned on.
If there is a dedicated line to each bay, and each bay has it's own solenoid valve, then either the solenoid valve is bad or its getting power somehow.

 

[Randy]

Did you install the new valve in the correct direction? Like Chris said start one of the other valves and check for stray voltage