I wouldn't put it past 70 or 80 psi if I were you. It's a great looking little gun but I spy a DWV coupler on the chamber. Safety first. That is not a dwv coupler, it is a pressure rated schedule 40 coupler. ive been making air cannons for years, i know the difference. And, that is my fiancee in th...

That shot was at 20 psi.
i have ran it up to 80 psi so far, but not in my apartment.

I build the pistol in an afternoon, my goal was to make a small, but powerful pistol type cannon. Spec's Chamber: 2'' Pvc Barrel: 1'' Pvc in a 1 foot length Valve: super modded 1'' sprinkler vavle Pilot valve: blow gun Fill valve: bike valve Features: Breech loading clip system. (The clip is not in ...