Polyethylene pipe and pipe fittings transport water, chemicals, oil, and gas in bulk water distribution, chemical processing, and industrial water treatment. Polyethylene (PE) and high-density polyethylene (HDPE) are polymers and the most common plastics in use today. PE and HDPE pipe and pipe fittings offer excellent chemical resistance, resist gentle oxidants and reducing agents, and provide high impact resistance at very low temperatures. Polyethylene pipe and fittings come in a variety of shapes and sizes.