Geopipes are made out of HDPE: High-density polyethylene (HDPE) / PVC etc refers to the thermoplastic polymer produced from the monomer ethylene. HDPE piping has a high strength-to-density ratio and is highly bendable, allowing for pipes to be coiled. HDPE is lightweight, flexible, inexpensive, and corrosion-resistant.
PVC in the form of pipes is employed in a sewer, and wastewater conveyance as well as within drains and vents associated with structures and equipment. Sinks, toilets, and liquid handling manufacturing equipment are examples that make use of drain, waste, and/or vent (DWV) PVC pipework.
PVC is a durable vinyl polymer whereas HDPE is a polyethylene thermoplastic made from petroleum. Both pipes are strong through high temperatures. When comparing failure ratings when exposed to events like rain, stress, wind, heat, or cold, HDPE is proven to be more durable.