I use pvc plugs and caps

I have made a few pneumatic Guns out of schedule 80 pvc and glued them correctly and had one fail.After that one fail,I decided to use fire extinguishers on the pressure side and use pvc on the exhaust side.i have put up to 250 psi in the extinguisher without a problem.i use various sizes of extingu...

fire extinguishers

i have used letter "f" the last one in the group.this is the one that is in the directions in "antennalaunchers.com" the only things i have changed ,is i use a fire extinguisher for the pressure side and i shoot a PVC plug,instead of tennis ball.i have shot it the length of a football field at 50psi.

i have used a fire extinguisher before and i use a 3/4 black iron from the extinguisher to the sprinkler valve from mcmaster-carr.then i use brass after that.

i went to a boat maker who is a frind of mine,and he said the pvc wrapped in carbon fiber wouldnt work,because the pvc expands just slightly with pressure.

i have been using a 4"barrel for the pressure side of the antenna gun.i quit using it when i forgot to glue 1 joint and at 80 psi,it blew apart.i now use a fire extinguisher.it stands about 2 1/2 feet tall about 5 " round.

this is my first attempt at building my own design .it has a few different barrels.1 to shoot tennis balls,1 to shoot 1 1/4 pvc caps,AA batterys,and paint balls.i have a fishing reel attached to it with 450 feet of spider wire(65 lb test). my next one is going to be with a welding tank (no seams) 40...

i used a 1 inch pipe thread nipple to go from the opening of the extinguisher,to the nipple.i use pipe dope with jb weld on the top of the opening
it works so far

when i used the fire extinguisher,i used pipe dope with jb weld around the top edge.yes i know its permanent,but i dont have leaks.i have tested it with the pvc plug ,and it shot it from one end of the football field to the other near the goal posts,with 90 psi

i work down street from a fire extinguisher store.they replace and design fire systems.i brought my gun in and asked them for an old tank.they gave me a new one for free.its better than pvc in the long run.i use it as the supply and its only 1 inch

use the used tire wheel weights from a tire store,instead of pennys.its cheaper and you can get all you want for free.

you might also try using a camlocks (http://www.americanonsite.com/american/catalog/quickdisc.html ) or (http://www.hosexpress.com/camandgroove/ezbosslock.htm ).i just did a google and came up with these 2 websites.i will be buying them for my pneumatic gun.i have 3 different barrells.1/2",11/2"and ...