Rigid plastic pipes for construction; Drain pipes, not of metal; Rigid aluminum-plastic composite pipes composed primarily of plastic for construction purposes; branch pipes, not of metal; water pipes, not of metal; rainwater pipes, not of metal; non-metallic building materials, namely, plastic pipe supports in the nature of cross-linked polyethylene (PEX) pipe bend supports; non-metallic pipes for ventilation and air conditioning equipment in the nature of ventilating ducts; non-metallic pre...