The Hayward Cartridge Element (CX1900RE) is the OEM replacement filter cartridge for the StarClear Plus C1900 190 sq ft cartridge filter, delivering the exact fit and filtration performance your Hayward filter was engineered to provide. What It Does The CX1900RE slots directly into the StarClear Plus C1900 filter housing, providing the full 190 sq ft of filtration surface area the system is rated for. It captures fine particles and debris on each pass, maintaining water clarity between cleanings and preserving the hydraulic efficiency of the filter as designed by Hayward. Specifications Hayward Part Number CX1900RE Quantity Each (1) Filter Area 190 sq ft Dimensions Length: 28-3/16"Outer diameter: 8-15/16"Inner diameter (center hole, top & bottom): 4" Fits Into Brand Equipment Line Model / Part Number Hayward StarClear Plus C1900 Compatibility is based on Hayward parts documentation and available OEM records. This is not an exhaustive list. For certainty, verify the part number in your filter's manual or on the original cartridge before ordering. Poolaroo Pro Tip Before ordering, measure your existing cartridge's length and outer diameter and compare them to the specs in your C1900 filter manual — this is the fastest way to confirm you have the right element. This is the Hayward OEM replacement, and there are many after-market cartridge filters out there. When it's time to clean, rinse the pleats from the inside out with a garden hose (never a pressure washer, which damages the filter media). For a deeper clean after a heavy season, soak the cartridge overnight in a dedicated filter cleaner solution to break down embedded oils and sunscreen. Replace your cartridge before the pleat fabric shows visible tears or the end caps crack — a degraded element can allow unfiltered water to bypass directly to the pool.