The Norwesco Manhole Extension is a black polyethylene riser measuring 20 inches in diameter by 15 inches high and weighing 13 pounds empty. It raises the height of a tank's existing manhole access opening so the lid sits higher relative to the tank top or a buried installation.
Dimensions and build
The extension stands 15 inches tall on a 20 x 20 inch footprint, with a 20-inch diameter body molded in black polyethylene by Norwesco. At 13 pounds empty it is a single-piece riser, not a bolt-together frame.
Fit
This is a Norwesco riser sized to a 20-inch manhole opening. Confirm the extension matches your tank's existing manhole diameter before ordering, since risers are not universal across openings. If burial depth or lid height is a factor, the extension can be trimmed to suit your setup. Unsure whether it fits your tank? Call 866-418-1777 and we will match it to your model.
This riser ships from the nearest Norwesco plant, including Griffin, GA; Hanford, CA; Owego, NY; Shawnee, OK; Sheldon, IA; Tooele, UT; Washington Court House, OH; and Washougal, WA. Small hardware like this may travel parcel or ride along with your tank; freight is quoted live to your ZIP through the Freight Cost Estimator, or call 866-418-1777 for assistance.
Freight and documents
LTL freight is quoted to your ZIP with the freight cost estimator or by phone at 866-418-1777. The listed price is before freight.
Technical drawing (PDF) for Norwesco 62397.
See this tank
Product video. Watch the Norwesco Manhole Extension 20 InchDia. x 15 InchH video (55 seconds) with dimensions, fittings and shipping notes.
Ready to order?
Add it to your cart at the top of this page, get LTL freight to your ZIP, request a written quote, or call 866-418-1777. The listed price is before freight.
