Should PVC schedule 40 pipe and fittings continue to be permitted for combustion exhaust venting? You and I have come across PVC that has gone from white to many colored shades: from light yellow to ...
All questions and answers are based on the 2005 NEC. Q. What is the minimum depth for placing Schedule 40 PVC conduit below a concrete slab? A. If it's under a building, there is no depth requirement.
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