Unicel Replacement Filter Cartridge 20 sf Hayward CX200XRE | C-4320 DE Filter It is specifically engineered for

It is specifically engineered for compatibility with DEV48

Works with J&J Electronics XG Controller

A fresh OEM-spec lid restores proper sealing

Always shut off the pump and relieve pressure before opening the chlorinator lid

Then add R‑0003 to re-pink the solution and again R‑0871 until clear—this second drop count ÷ 2 gives combined chlorine

Unicel Replacement Filter Cartridge 20 sf Hayward CX200XRE | C-4320 DE Filter It is specifically engineered forUnicel C 4320 Replacement Filter Cartridge 20 sq ft The Unicel C 4320 is a high quality replacement cartridge designed for smaller pool and spa filtration systems. Its pleated media provides efficient debris capture, helping maintain clear and balanced water. Key Features 20 square feet of premium pleated filtration media. Durable end caps and rigid core construction for long service life. Designed to restore optimal flow and filtration in compatible