This is the official product video for the Norwesco 20 Inch Domed Septic/Water Lid. Full specifications, dimensions, and live pricing are on the product page.
In the quiet under the ground... a revolution in containment. The Norwesco 20 Inch Domed Septic/Water Lid is a polyethylene design engineered to replace legacy steel and concrete tanks... corrosion-immune to sewage gases like H2S, CH4, NH3 that pit and crack metal and concrete. Integrally molded internal baffles or a compartment-divider wall... no field assembly. Manway risers and lid accessories sized to the OEM connection. Direct-bury rating with rib-reinforced walls to handle typical residential backfill loading. Lightweight enough for one-truck set — a typical 1000-gal HDPE septic tank weighs under 300 lb empty versus 7,000+ lb for equivalent concrete. Certified for code-conforming residential septic-system installation... Norwesco 20 Inch Domed Septic/Water Lid. Corrosion-Immune Strength. OneSource Plastics.