My wife works where they sell pipe and she says they have 3 grades of pvc for water sch40, something called cell core? or 200, and then the thinner drainage and sewer pipe, all which fit and glue into sch40 fittings. I'm a guy that usually likes to "over build" for strength, (do it right and do it one time) but I'm really considering stepping down from sch40 pipe this time. How about it, anymore experienced peoples opinions of this?
I am using SpaFlex for the 4way connections to the tank for ease and less restrictions.