Thanks, yeah copper is expensive, I would like to build a copper gun sometime, so that I can ramp up the pressure a bit more, but for now PVC is inexpensive and I am still learning, I think my next gun will either be an oxy/propane, or a coaxial, but not sure yet

Yes, I am 100% positive that the reducer in question is pressure rated, and yes it does say NSF-PW, and thanks, I am also a big fan of your work

It is actually pressure rated, I made sure before I bought it, i know it may not look like it, but it is actually made for use in high pressures

yeah, I primed everything first, and realized I primed the outside as well, oh well it is getting painted anyways, and I couldn't find a bushing while shopping, so I went with this, and the reducer wont make any difference, since it is still pressure rated

This is my new design of the Semi auto golf ball cannon. The valve was designed with the help from a few people, especially Gun freak, so thanks for the help. It uses a 3" tank that is 2' long. it is threaded into the valve, so I can change it out for something smaller of larger if I want. It is usi...

If i use gun freaks washer and o-ring piston valve, like shown farther up, i wont need to make and equalization holes, will I?

Yes it is helpful,but one question, where does the air go in in the picture u posted, cuz if it goes in behind the pilot, it wont make it to the chamber

do I need to modify the adapter, so that the 1.5" barrel goes into the T, or can I do a regular adapter, and go from a 2" to a 1.5" outside of the T?, do I have to modify anything inside of the T, or can I just put the piston in it?

so if I make this piston and put it into a 2" T and have a 2 inch pipe, down to a 1" pilot on one side, and a 2" to a 1.5" on the other, it will work? I am getting confused, i thought it was the size of the piston face that determined which direction it would go. will i be bale to use it the way i l...

why do I need three? washers on the bolt? and how do i make sure that the pisotn goes back when the vlave is piloted? doesn't the washer on the left have to be biger than that of the right, so that it will go in that direction since it would have more force?

Yeah I have been looking, I see people using Very large O-rings, and I dont know where to go to get them, i would like to build a washer and oring piston

Yeah i will use that, Another question though, what material should i use for the piston itslef? what works good to make sure it seals properly and wont break? I was thinking some sort of rubber sheet, or O-ring but dont know where to find them?

Yeah, I think i will work on making a piston valve, thanks for the help guys. right now I use a 4" by 3ft chamber and I dont need that much air, so I will cut it down, and work on a piston valve. And sorry I didnt mean to double post, how do I delete posts? My internet and computer were messing up, ...

Thank you for your input, I really appreciate it. And I really apologize if i came across as rude earlier, I just really didn't want to be robbed of my ideas. I have been in the past and dont want a repeat of that. and I really like the slide valve idea, but i think i am going to try and shorted my ...

Yeah that is similar, only mine is more compact, and less complicated, and no wasted space. I dont have a bolt behind the piston, i found it doesn't need it, but u have given me something to think about could you explain to me what a slide valve is? the diagram u posted, th way it is set up, if u pu...