But not [truebassB], instead he built his own air pump from first principles (YouTube, embedded below) using PVC pipe. It’s a straightforward ... with a section cut out to reduce its diameter.

One of his more interesting builds is his series on building rocket engines out of PVC pipe written in conjunction ... out of 2 or 3-inch PVC may not make much sense due to the increased chamber ...

So one reader made knife containers out of 2 pvc pipes and caps. He glued the cap on one end and marked the unglued cap with ...