I am having the same problem with my new Procon pump. The outgoing pressure builds up and it does not allow the presoak to work. This is getting annoying!
2 Replies to “It’s Bad When You Have O PSI?”
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Car Wash Blog / Self Serve Industry Blog and Forum
I am having the same problem with my new Procon pump. The outgoing pressure builds up and it does not allow the presoak to work. This is getting annoying!
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You probably have a bad high pressure check valve letting pressure get trapped behind a solenoid, then the solenoid isn’t able to open against the pressure. If there’s no solenoid after the pump, never mind.
I just noticed the title after I posted my comment – it’s not at zero PSI, the gauge is spun all the way around because of trapped pressure. That confirms a check valve problem and pressure trapped behind a solenoid. There was probably nothing wrong with the old pump either. You can prevent it from happening again if you remove the low-pressure check valve between the pump and the tank.