Round manholes with bolted and gasketed cover. Used for access ports in driveways where limited access and/or water-resistant conditions are required. Bolts are standard hex head stainless steel, except for the 418 18"x 12 and the 18"x18" which uses a flat head screw. Gaskets are Buna-N. Meets H-20 load requirements.

Features "TANK MONITOR" text for UST leak detection. Bolt down and gasket style.