18 x 18 Inch SuperFlow Main Drain Grate Only 816 GPM (Package of 2) inlet-pipe-size_5" The installation kits include a

The installation kits include a tubing check valve assembly

This is a Regal Beloit Century ST1052 Full-Rated Two-Compartment

and Van Stone Flange with epoxy coated steel back-up ring

apply 1 pound per every 15

18 x 18 Inch SuperFlow Main Drain Grate Only 816 GPM (Package of 2) inlet-pipe-size_5" The installation kits include aThis is an 18 x 18 inch 816 GPM replacement Main Drain Grate Only. This comes as a pack of two. The domed SuperFlow main drain grating is unique since it has the capability to maintain a flow rate of 816 GPM (18 x 18 inches). Includes grate (cover only) and screws. This anti entrapment cover is VGB compliant and certified to the APSP ANSI ICC 16 2017 standards.