plastic pipes for plumbing, plastic pipe connectors and fittings, plastic drainage conduit; plastic and/or rubber seals for plumbing pipes; semi-manufactured plastic in the form of bars, blocks, rods, sheets and pellets for use in general manufacturing; fire resistant plastic panels for building construction; plastic panels as semi-finished products for lining and/or covering concrete drainage pipes and non-metallic connectors, couplings and seals for use with drainage pipes and covers and pl...