Hey Chris...
I just went thru all this pipe grade calculations 18 - 20 months ago. I ultimately went with 6" PVC Schedule 40, but you have to be careful. There are different grades of Schedule 40 based on the ASTM manufacturing spec. It has to do with the pressure handling capability. Not all Sched 40 is ASTM graded for pressure. Some is only DWV (drain/waste/vent). I got outstanding customer service and support from
these guys . I remember, their cust service rep on the phone was a guy named Chad Presske. He was pretty darned good; bet he's moved along into management or sumthin'. Anyway, their on-line catalog is outstanding. Their hard-copy product catalog is the excavator/plumber's product bible. I would study their on-line stuff, then call them in the morning. I actually wound up buying my 6" fittings and glue from them. It was cheaper in the quantity that I used than any home center. Good product, good service, good prices.
