The water main shut-off valve in a home is usually located in ... Skip this step if you’re working with a PVC pipe. Next, slide the compression nut onto the copper or PVC pipe with the threads ...

[NightHawkInLight] a.k.a. [Ben] recently built an awesome high power air cannon out of PVC pipe. PVC air cannons ... makes this build exceptional is the valve. [Ben] created a piston valve for ...