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

This Stenner chemical pump #85MFL5A1SUAA provides reliable chemical feeding for your swimming pool

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

9 inch anchor

HOW TO WASH YOUR POOL:

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.