Duckbill Check Valves - 1/4 Inch - FKM - Package of 5 discharge-pipe-size_4" The One-Meter Duraflex Step features

The One-Meter Duraflex Step features a two-piece design that allows replacement of the slip-resistant tread without the need to disassemble the ladder

This is a PVC 45 Degree Elbow with Slip x Slip fitting connections that measure 6 Inch

It has the ability to clean an Olympic size pool in as little as 5 hours and a junior Olympic size pool in 3 hours

The o-ring is 3-3/8 Inch OD x 3 Inch ID x 3/16 Inch thick

Can be used with or without a pea gravel base (refer to your filter manufacturer's recommendations on media installation)

Duckbill Check Valves - 1/4 Inch - FKM - Package of 5 discharge-pipe-size_4" The One-Meter Duraflex Step featuresThis is a 1 4 Inch Stenner FKM Duckbill Check Valve for all Stenner pumps excluding models with S4 prefix. It includes a FKM duckbill and 1 4 inch ferrule. This chemical injection check valve also works on CAT Controller models CAT 1000, 2000, 4000, 5000 and HCC Automated Controllers with Stenner pumps. This duckbill valve is constructed of FKM rubber, also known as Viton. FKM provides additional heat and chemical resistance and may be required