But not [truebassB], instead he built his own air pump from first principles (YouTube, embedded below) using PVC pipe. It’s a straightforward ... A couple of ball check valves are used for ...
[NightHawkInLight] a.k.a. [Ben] recently built an awesome high power air cannon out of PVC pipe. PVC air cannons ... Instead of using a ball valve or other such contrivance to dump air directly ...
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