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This purpose-built back ring is designed to fit Hayward SP0607 PVC niches
Simple replacement with common hand tools minimizes downtime during maintenance
Dolphin S400
Exact Dimensions: 7 in outer diameter by 25-1/2 in height to match your SwimClear housing
and chemicals year-round
Waterway Crystal Water 325 SF Cartridge Filter For Two Point Five Inch Piping gray flange This purpose-built back ring isWaterway Crystal Water 325 SF Cartridge Filter For Two Point Five Inch Piping Intro Meet the Waterway Crystal Water 325 SF Cartridge Filter, a high efficiency filtration solution designed for modern pool and spa systems. Built around a robust 2 1 2 inch internal piping core, it delivers strong flow while keeping noise to a minimum. With four replaceable cartridges and a compact housing, this filter excels in both new installations and replacements,