Classification Information
Drain pipes, not of metal; Non-metal air conditioning ducts; Non-metal air-conditioning ducts; Non-metal gutter pipes; Non-metal water pipes; Non-metallic drainage pipes; Plastic conduit for drainage; Plastic conduit for drainage and irrigation; Plastic water conduits for roofs; Plastic water conduits for roofs and balconies; Water-pipes, not of metal
Nonmetallic Building Materials