[Rickertsen2]

I might just be lucky and or stupid, but i have built a least a dozen pvc based projectile launchers some of which have been statically pressurized to pressures up to 350 psi. The only failure i ever experienced was a hairline crack in a combustion potato cannon leading from a screw screwed into the pvc as an igniter electrode. The cannon had been left out in the sun for some time. SUN DESTROYS PVC. I am not saying it safe, only that i have never had any serious failures.