thanks verry much guy's i tried a 1/2" ball valve today and it worked great i will be finishing the cannon as soon as i can. i will post some pics when i'm done

ok thanks il try that today

today i made a new piston that was longer and put some 2" pipe on the inside of my valve. it did the same thing. the air is leaking around the piston instead of pushing it back. its a snug fit but still slides well. any ideas

I have been working on my first piston valve.its been an on and off project for a couple of months. i cant seem to get it to work. its a Barrel sealing tee valve housed in a 2" tee with 1 1/2" porting. until i get it working im just piloting it by disconnecting the quick connect i use to fill it. i ...