7 years ago
"comforting" diagonal data about fall heights, column separation, etc, I
cannot find a stated vacuum rating for ASTM D2729 pipe (4").
I'm getting ready to re-do a poorly-designed vacuum hold-down system for
a ShopSabre 4896 that has only ONE 2" pipe to each half of the table,
even though the pump has a 4" inlet!(duh!)
4" water pipe (sch 20-40-80) is slightly too large to fit in the space
provided, but 4" ASTM-D2729 sewer pipe will fit. We're only talking 11"
of vacuum (or -5.4psi). But I want some margin of safety, and can't find
a figure anywhere.