[NightHawkInLight] a.k.a. [Ben] recently built an awesome high power air cannon out of PVC pipe. PVC air cannons ... replaced with a valve from a sprinkler system, giving this high power PVC ...

Local hardware stores usually offer foam insulation tape, foam pipe ... clear a sprinkler system constructed of flexible polyethylene pipes, and 80 psi is needed to blow out rigid PVC pipes.