This is how we’ve been doing our weep system for the last 30 years. Off of the main water supply we have a ½” ball valve and then a ½” Normally open solenoid valve, I like to use a ASCO 8210-G34 or a Dema 0474P valve. I made a manifold that runs behind my equipment, and I have weep water feed to each pump off of that manifold. The weep water connects into ta Tee at the High pressure discharge off the pump with a needle valve, high pressure stainless steel check valve. The manifold behind the equipment continues on the foam brush system and connects pretty much the same way. I'll try to get some pictures next time I go to the wash