PVC fittings in 5 inches?!

[Marffy]

i was looking around mcmaster and i found pvc fittings in 5 inch. but i wasnt sure if it was pressure rated. so i dont know if they do make 5 inch pressure rated pvc fittings in 5 inch. my question is: do they? because i want to make a real cannon. not an average sized cannon but a huge 5 inch "T" style piston valve with 4" porting. i might make a 4" piston so it could be hand-held but i just want a huge cannon. i already have enough midsized ones.(ok, not really because theres never enough cannons but...)

[jimmy101]

http://www.plumbingsupply.com/pvc.html has 4", 5", 6" and 8" fittings. Just the basics though like couplers and Tees.

[Marffy]

http://www.plumbingsupply.com/pvc.html has 4", 5", 6" and 8" fittings. Just the basics though like couplers and Tees.

do you know why theres such a huge price difference? its huge like double for an inch more...

[poppamies]

here in finland we dont even have the 4" PVC, only 90mm and 5":D