SpudFiles

Well my last cannon I built someone told me that the reducer I had used was not pressure rated so I couldn't push it past 60 psi.

I'm planning on building a standard pneumatic that will be safe to 90-100 psi.

I'm planning on using 2 feet of 4" SCH40 for tank and then reduce to a 1" barrel with an orbit watermaster then having 4 feet of 1" SCH40.

I've used GGDT and no errors or warnings but I need to know how to reduce from my 4" resovior to my 1 inch orbit watermaster and barrel.

I can't find any pressure rated reducer bushings that will go from 4" to 1" or even 4" to 3".

Your help would be much appreciated, thanks!

Try McMaster.com that where I buy.

Ya but they don't seem to have 4" to 1" reducer bushings. Anyone have any suggestions?

Would it matter if I went from 4" to 2" then from 2" to 1 "?
And for it to be pressure rated I want it to say NSF?

The one's at mcmaster say ASTM and NSF.

But then they say never use plastic pipe fittings for compressed air or gas?

Every manufacturer of PVC says never use plastic pipe fittings for compressed air or gas

So if I went with this 4" to 2" socket-weld reducer bushing
And then went to a 2" to 1" socket-weld reducer bushing, I would be able to be safe at 100 psi?

Yes, it would be safe. And fix your link, it stretched the forum beyond recognition!

Thanks for the help guys, just wanted to make sure I got everything right BEFORE I put it together =)

wellthat will be a cool gun you should have a few barrels make it more versatile if you jhva ethe money cus these cannons can burn holes inn your wallet

If its pressure rated, it'll say nsf-pw.

you can also go to http://www.plumbingsupply.com they're cheaper and if i recall, all of there fittings are pressure rated