The Tier1 DPFPCC0021M11DBT is a 2-pack replacement pool and spa filter cartridge engineered as a compatible alternative to the Pentair Clean & Clear Plus 520 (CCP520) cartridge set. Each cartridge offers 130 sq. ft. of filtration surface area (520 sq. ft. total across the 4-cartridge system), making it ideal for large residential in-ground pools. It fits Pentair Clean & Clear Plus CCP520 and American Quantum QRP520 filter housings.

The Tier1 DPFPCC0021M11DBT features a 20-micron filtration rating, capturing fine debris such as dirt, sand, pollen, algae particles, and other small contaminants from your pool water. The reinforced polyester filter media is paired with durable end caps and a rigid inner core to ensure consistent flow and long-lasting performance throughout the swim season.

Tier1 recommends replacing the DPFPCC0021M11DBT cartridges every 1 to 2 years, depending on pool usage, bather load, and water conditions. For optimal performance, rinse the cartridges every 2–6 weeks with a garden hose and deep-clean them with a filter cleaner every 3–6 months. Replacing all cartridges in the set at the same time ensures balanced flow and filtration across the CCP520 housing.

Each Tier1 DPFPCC0021M11DBT cartridge measures approximately 25" in length with an outer diameter of 7" and an inner diameter of 4". The top end cap features an open handle design, while the bottom end cap is open with a molded gasket for a secure seal inside the CCP520 housing. This 2-pack covers half of a full CCP520 cartridge set — pair with a second 2-pack for a complete replacement.

The Tier1 DPFPCC0021M11DBT is not an OEM cartridge — it is a high-quality aftermarket replacement manufactured by Tier1 to meet or exceed the performance specifications of the original Pentair CCP520 cartridge. Because it is a direct-fit replacement using the same dimensions and media specifications, it will not damage your pool filter housing. Always verify your specific filter warranty terms with the manufacturer before installation.