18 x 18 Inch SuperFlow Main Drain Grate Only 816 GPM (Package of 2) filter-length_18 9/16 inches They are a step-up from

They are a step-up from the polished stainless steel finish

The Pentair Large PVC Light Niche for Concrete Pools has a one inch hub and includes both 45 degree and 3/4 inch reducer bushings

The display shows separate lines for units

040 mil Styrene Plastic and is designed to inform patrons that the rock climbing wall is closed

This clarity measurement is required by the majority of state health boards for swimming pool safety

18 x 18 Inch SuperFlow Main Drain Grate Only 816 GPM (Package of 2) filter-length_18 9/16 inches They are a step-up fromThis 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.