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Old 10-26-2012, 03:01 PM
rlitman rlitman is online now
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Join Date: Sep 2009
Location: Long Island
Posts: 1,355
Originally Posted by Wet_Boots View Post
I would think the foam-core stuff is DWV pipe. No big pressure worries there.
It is. Sch 40 only refers to the dimensions. The DWV pipe isn't meant to withstand as much pressure, but I believe the concerns raised by the OP were related to the collapse of the hole. Regardless of the pressure the pipe is rated to contain, a solid PVC pipe will withstand more crushing pressure from above than a foam core one.
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