The Hayward 2 Inch SP0410X602S Side Mount Slide Valve (also called a Push/Pull Valve) is made for Hayward Pro Series Sand Filters and has 2 inch plumbing ports. This valve is made of Hayward exclusive PermaGlass XL material and has been designed to provide maximum flow and a long life. Vari-Flo slide valves feature an easy-to-use push/pull action allowing you to filter and backwash your sand filter.