Air Cannon Pipe

The pipe I used for both the air chamber and the barrel on my air cannon was thick wall (schedule 40) 2" PVC pipe. I don't remember if the thinwall pipe had the necessary pressure rating, but it didn't look ruggged enough to handle the riggors of a paintball field. Pesco also made an air cannon with a 1.5" diameter barrel. I have found the 2" to be small enough to carry easily, yet large enough to handle a good size group of paint pellets.