"Know your copper" the most common are. DWV= Thin wall, drain, vent, waste (not for pressure). See More Copper Pipe Visit store.This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Pools & Spas\Other Pools & Spas". The seller is "pvcpipe123" and is located in this country: US. This item can be shipped worldwide.