Hayward W3C500 50 Sq. Ft. StarClear Cartridge Filter It uses only 1

It uses only 1

CPVC union coupling connection provides plumbing options of 2-inch or 2-1/2-inch piping with 2-inch full flow internal piping for maximum performance

and Monopersulfate

This socket cap screw is designed to use with Pentair Intelliflo VF

Features: Analog Duplex Panel

Hayward W3C500 50 Sq. Ft. StarClear Cartridge Filter It uses only 1Hayward W3C500 50 Sq. Ft. StarClear Cartridge Filter. Hayward C500 50 sq. ft. StarClear Cartridge Pool Filter. This filter provides crystal clear water and has extra cleaning capacity to accommodate pools and spas of all types and sizes. For replacement or new pool installations, StarClear sets the standard of excellence and value. A single locking knob securely fastens head to filter tank, eliminating bolts or clamps. Attractive, durable filter head