This product ships FREE via LTL to lower 48 states.
"Onsite flexibility for installation can't be overstated."
The ‘cut to suit’ Extension Riser is supplied with an additional frame interfacing directly with the tank. The original cover is removed for installation and relocated to the top of the extension when ready to backfill.
The air and water tight Extension Riser provide a fast and easy means to achieve a perfect finish at grade/floor level.