Model TW - Risers Brochure

TW-Risers by Infiltrator are made from glass-reinforced polypropylene, providing superior strength and durability. Available in green or black with a 24-inch diameter, making them ideal for use with any concrete or plastic tank. The slip-resistant lids are fastened using stainless steel screws and are further secured by indexing structural ribs, that lock the riser into place.TW-Riser system lids are made from virgin polyethylene, providing strength and increased impact resistance. The improved urethane gasket creates a built-in watertight seal. Lids can withstand a wheel load comparable to that of a full-size pickup truck.