Here we go again: PVC PIPE FOR AIR SUPPLY LINES
Gunner Asch writes:
There's white PVC, and the slightly colored CPVC. I'm not
sure if one has higher pressure rating.
The Grey is Sched 80 as I recall. Its MUCh thicker wall than the white.
Much of the gray is DB-120; it's far weaker than even Sch 40.
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