the golf ball? 70,, i've had it up 160 PSI on the 1" barrell

right now i built my first gun.. it has a 4ft 3" chamber, and a 5ft 2" barrel, and a 1" one... with the 1" it shoots rocks baout 200yards at about 90psi.. i know the valve is slow to open, and i tried my 2" barrell n put a golf ball in it.. it barely even made it out of the barrell, 2 feet maybe.. i...

it says Genova Coex Cellular Core PVC-DWV Pipe IPS SCH 40 ASTMF-891-04 70031F

i currently have 4'x3" PVC DWV as my chamber. I was wondering if anybody knows hte PSI rateing on it.. its standard SCH40. I didn't know if the DWV ( guessing its drain waste vent ) andi need to know if it will hold 150PSI +.. i know regular schedule40 will but don't know about this DWV. Just want t...