Hayward CX880XREPAK4 replacement cartridge filters provide 425 square feet of superior filtration to keep pool water clean and clear. Designed for compatibility with SwimClear models, they ensure optimal performance and longevity. Easy to install, these filters help maintain a healthier swimming environment with minimal effort.

Compatible with the following Hayward SwimClear Cartridges Filter Models:

• C4030
• C4025
• C4020
• C4000

Genuine Hayward Part, brand new from Hayward. No knock offs or substitutions.

How to Maintain Cartridge Filters

Cartridge filters eliminate the need for weekly backwashing but should be cleaned 2-3 times per season. Clean them when the PSI on the pressure gauge reads 6+ psi above the initial pressure or exceeds 18 psi overall, as this indicates clogging that can obstruct water flow and affect pool function. Follow the owner’s manual for proper removal and cleaning. Once per year—ideally after closing—rinse and use Filter Brite for a deep clean to extend filter life and ensure they’re ready for spring

Owners manual instructions here

When to replace Cartridge Filters

Pool cartridge filters should be replaced every 3-5 seasons to maintain optimal pool system performance. Older filters or those needing replacement often result in higher PSI, even after cleaning, which slows water flow and impacts the system. This can lead to cloudy water, inefficient chemicals, weak skimmer suction, difficulty vacuuming, or a malfunctioning heater. Clean and replace filters as needed to keep your pool in top condition for a more enjoyable experience.