What is DWV Pipe?

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Delock Slot bracket 1 x 19 pin USB pin header female internal > 2 x USB Type-A female external Low Profile Item No : 82976

DWV R09 N62 Re - Westerscheldetunne Hoek Lichtkrant 11-07 - Pand Oud-Vossemeer op slot na vondst wi 11-07 DWV PE pipe PVC DWV PVC pipe PVC thin wall Stainless steel - grade TP - 409 slots , and FS DDD - S

coin slot machines in vegas Delock Slot bracket 1 x 19 pin USB pin header female internal > 2 x USB Type-A female external Low Profile Item No : 82976  What is DWV PVC used for, and is it different from schedule 40 PVC pipe and fittings?