I'm wondering if anyone is familiar with proofing and if it applies to various PVC fittnigs and pipe. Proofing is the centuries old practice of overloading a firearm or cannon to pressures that they will never encounter again. The theory has been that if the proof load doesn't blow up the gun then l...

Thanks. I've found the perfect tube to fit inside that L type copper. It's a short 1/4"NPT brass nipple. I was able to chuck it up in a 1/2" chuck and minimally turn/file it down to make a perfect fit. After I soldered it with just the right protrusion, I bored it out bigger to handle more exhaust. ...

I have a problem finding a short piece of tubing/pipe/whatever to fit inside type L copper tube. I am building a 1/2" piston valve for relieving a 2" (1.5" Ported) main piston. It would have to be something that I can solder in place. I have turned a piston from oak and faced it with gasket rubber. ...

God help me, but this is a discussion forum and hopefully I can ask a question here. If not then I won't bother anyone anymore. Has anyone ever tried to make a secondary piston valve to dump the main piston valve, and if so, what are your suggestions? Thanks.

Okay, where do we ask questions?

Can anyone help me out with ideas for a 1/2" piston valve to exhaust my primary 2" main piston valve? It seems that it would be cheaper than a sprinkler valve.