HDPE pipes and fittings includes: 1. HDPE Pipe, Pressure rating: SDR 41 - SDR 6, with size from DN16mm - 1600mm. 2. HDPE Butt Fusion fittings, Pressure rating: SDR 41 - SDR 6, with size from DN6m - 1600mm. 3. HDPE Electrofusion fittings, Pressure rating: SDR 41 - SDR 6, with size from DN6m - 400mm. 4.