Help manifolds

[bubbysbubblescarwash@gmai]

Hello, I have three bay car wash, I have four port solenoid manifolds all four high Pre.. I am getting back feed when the wax is hook up and will only let wax open. How do I take care of this back feed. IT is only doing this on bay two and three which share a power box, bay 1 has no problems all four functions work fine.

 

[MEP001]

Post some pictures of your pump plumbing. Try to include everything, multiple pictures if necessary, and I don't mean a black-and-white image from your surveillance system of the entire side of the room.

If you have city pressure feeding the pump on rinse, it's going to back up into the wax without a check valve to prevent it.