Pneumatic help :/

[jmeyer1022]

I decided I'd continue my Advanced Combustion cannon plan pretty close to done just gotta get a few more fittings for the direct propane inject and its done.

But I bought a Sprinkler valve a few days ago and wanted to make an easy pneumatic cannon. It's a 1" inline rainbird 100 already modified. I went to home depot and was looking for a 1" male adapter to run to a 2"x 1" bushing which would go into my chamber and then again off the other side using a male threaded adapter. I can't find any 1 to 1.5 Inch bushings. How do I go about sizing from 1 to 1.5 for my barrel. I've worked alot with PVC just never 1" piping use to 1.5"and 3".

[Gippeto]

Perhaps use threaded black iron fittings between threaded pvc to get to the right pipe size?

It's a pain when you cannot find the right parts isn't it?