foam brush chemical leaking into my weep system

[audiosnow46]

I have 2 self serves that have foam brush chemical leaking into the weap only when someone uses the foam brush. I have changed a couple of check valves but it didnt seem to help. Anyone else know what it could be?

 

[Randy]

I just had the same problem last week. You've got a bad check valve in the foam brush system weep system. You must have changed the wrong check valve.

 

[audiosnow46]

alright ill check again... thanks