SKU 89-3009-R12-NG
The PolyLok 3009-R12-NG is a 20 in. x 12 in. high-density polyethylene (HDPE) septic tank riser that provides a robust, watertight and airtight extension to bring your septic access point up toward finish grade with fewer fasteners for quicker assembly. Its internal structural ribs help resist frost adhesion in cold climates while allowing easy vacuum or water testing of the tank. This riser is stackable with other PolyLok components and works with standard 20 in. covers and accessories for a customizable installation.