weep-mizer backfeeding

[jomolnar1]

weep-mizer seems to back-feed into wash, rinse and wax tanks on manual bays pump stand causing them to overfill and drain from overflow. My question: could a check valve be added after the point where the three solenoids converge. Does the "Cat" pump produce enough suction to overcome a check valve ? Apparently these solenoids don't prevent a reverse flow. I'm sure the spot-free pump is probably back-feeding too, just not a noticeable because it isn't on as long. Thanks for any suggestions.

 

[Randy]

My best guess would be you’ve got a bad check valve in the system. The first place I’d start looking would be where the weep water connects into the High Pressure line at the pump. Replace the check valve with a high quality check valve like one of these http://www.kleen-ritecorp.com/p-1764-fluid-controls-check-valve-14-viton-ss-hp.aspx