I finally got enough money and i bought the parts. It launchs potatos 350 plus feet at 70 psi . My friend and i shot the back out of an old mailbox.

What is the difference between a bushing and a bell reducer?

Thank you for trying to help, but i decided i am going to just give up and make a combustion canon.

Yes. I used Harvey's purple primer and Harvey's p-4 pvc cement and i let it cure for somewhere between 24 and 36 hours.

It is made out of SCH 40 pvc and it broke at the reducer. The pipe did not break at all just the glue broke. I have a picture but i can't put it on my computer.

I am building my first ever canon and the air tank broke off when i was charging it up for the fourth launch. I don't have a job right now so money is a problem. Everytime I have tried to glue back together it instantly falls a part. Is there a way to reglue the air tank back on without having to ...