I didn't think it was a stupid question most people from what I can see use schedule 40 unless,they're building big time stuff. I used same thing 12v94 used.short radius schedule 40..Keating machine is who told me to go with that size because his flanges were made for it..
That Keating flange is NICE. I skimped out and bought the other one you see out there...HT3B to 3"....
If my buddy has the pieces in stainless...may just have to fork over the $$ for Keatings stainless one. ha ha ha
Nice pipe attached to my rusty ass WH1C!