I made a cannon a couple months ago that had a piston valve, but my design was flawed and the valve failed on me. I am posting to see if someone can give me detailed instructions or direct me to a place where I can find directions to make a piston valve that screws into a 1.5" threads on each side. ...

Is there still a big advantage from a 1" sprinkler valve to 1.5" port piston valve? Or would that not make too much of a difference? Also, I'm pretty much stuck with an under over config, I already have the barrel and chamber built. I switched my plans after I started the build. Also, since my barre...

I dont think im up for a full 3" port, I want to make it a bit more compact

Also, I'm not willing to shell out the cash for a 2" sprinkler valve[/quote]

well Ive built 6 actually now that I think about it 7, 2 combustion cannons got confiscated when I used them in Joshua tree natl. park. The rangers really did not like it one bit at all. My first pneumatic was made of bad pvc and cracked after a few pressurizations. My second one, my parents took it...

Well I've been in the process of planning/ building a fairly compact tennis ball cannon with a 4" chamber. Under-over config. I have run into the problem of the valve. I was initially planning on using a 1" modded sprinkler valve, but i decided i wanted higher performance, so i decided to try a pist...