It's piloted out the blow gun through a fitting in the pressure chamber. I would probably move it to a reducer so it would pass through 2 layers of pvc.

Hi all, I've been a combustion fan for 5 years and have recenly built my 1st air powered cannon. Dwv was about all I could find. The dwv pipe is rated well within my limits @ 260 & 370 psi. Are the fittings the the supposed problem? They looked pretty dang sturdy to me. Also I'd like some feedback a...