This Architectural Drawing is AutoCAD 2dd rawing of Main water line plumbing for bathrooms drawing in AutoCAD, dwg file. Polyvinyl Chloride (PVC) Pipe is widely used for new water main applications. PVC pipe material is inexpensive, durable, and lightweight. Furthermore, it is corrosion resistant and nonreactive with most chemicals. Only ductile iron pipe is used as often for water main applications.