I know little about plastic pipe, but some of it will tolerate some impressive pressures. As such, it seems one could use some plastic pipe in the category of schedule 40 or 80 with a glued cap on the bottom. The shop I work in is plumbed with 1/2” for the 100 psi compressor lines that are, now, nearly thirty years old.
I pick up used nebulizers from garage sales. If you pop the top, disconnect the hose from the output and reconnect it to the input, you have a lightweight vacuum pump. I built a large vacuum system, using Corian and 1/2” plexi I had laying around, for the wife’s kitchen operations and powered with one of these and it works fine for bag sealing. I don’t know if it has enough boost for this, but for two bucks….....
