I have a gc valve manifold block, non metering. One of the stems that screw in the block has a pinhole in it. Had to take the solenoid off to see it. What is the stem called and would anyone know a part number? I had to crimp it off and solder it up so my other bays could keep working ( so I thought). I got it soldered up but could not put the plunger/spring back in it. I screwed it back in the manifold and now my flojet will not pump on the other bays. It pumps barely ever 15 sec or so. I took the air line loose from the air manifold for the bay I was working on and foam comes back out of air line. Would the plunger not being in the block cause these problems? None of 4 bays foam brush work right now.