Rhan 1: Rhan Peiriant Rhan 2: Pibell Hdpe Rhan 3: Pibell Hdpe Wesh Dur Rhan 4: Gosod Electro Fusion Rhan 5: Pibell Hdpe Cyfansawdd Stribed Dur Rhwyll Pore Rhan 6: Gosod Pibellau Hdpe