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I believe it is for spot free rinse. On my system there is a solenoid, I think it’s called, off the main weep line for each bay.

I’m ln Colorado. It’s has been around 20 degrees at night . The problem bay is in the dead center of the carwash. I believe the cracking pressure on the check valve is around 10 psi. I have switched my weep lines from the next bay over and that bay has been working fine but my bay 3 is still...

There’s another check valve just on the other side of the T fitting in my last picture that seems to be working just fine though and isn’t jamming closed.

I circled the check valve I’m having issues with. It’s the last check valve before the high pressure hose. I’ve already tried putting a brand new gun outside also and I’m still having the same issue

I have a 5 bay self serve carwash. One bay continue to freeze about once a week. the check valve where the weep system meets the hight pressure hose continues to jam. I have tried about 4 different check valves and 2 different brands. If I take the check valve off and loosen the ball from being...