And you can return the extras when you're done. Join Different Types of Pipe with Transition Coupling Note: Transition ...

which communi cate with and are supported on each other by means of hollow pedestals (one pedestal to each pipe), which are placed alternately at opposite ends, so that the air passes all round ...

[NightHawkInLight] a.k.a. [Ben] recently built an awesome high power air cannon out of PVC pipe. PVC air cannons are great, and everyone should build one of these at some point in their life ...