4-Pack Replacement for Pentair Clean & Clear Plus 520 (#160332), Waterway 525 | 520 Sq. Ft. Pool Filter Cartridge | 7" OD x 32" Length | Compatible with Unicel C-7472, FC-1978, OEM 178585, R173578

["520 SQ FT PROFESSIONAL 4-PACK: Includes four premium pool filter cartridges providing a combined 520 square feet of filtration area. Constructed with advanced 5 oz+ Trilobal Fabric, these filters trap finer particles than standard point-bonded material, ensuring superior water clarity and longer cycles between cleanings.t traps finer particles and extends filter cycles. 5 oz+ weight for durability.","PRECISION FIT & VERIFIED COMPATIBILITY: Engineered as a 1:1 drop-in replacement for Pentair Clean & Clear Plus 520 (#160332) and Waterway 525 systems. Also a verified alternative to Unicel C-7472, Filbur FC-1978, and OEM part numbers 178585, R173578, PCC130-PAK4, and 817-0131. Dimensions: 7\" OD x 32\" Length x 3\" Open Hole.","ENERGY EFFICIENT HIGH-FLOW DESIGN: The optimized pleat spacing and open-core design significantly reduce backpressure on your pool pump. This allows water to pass through more freely, lowering energy consumption and operating costs while maintaining optimal circulation.","TOOL-FREE, LEAK-FREE INSTALLATION: Features precision-molded end caps for a 100% leak-free seal. Once the filter tank is open, this direct drop-in design requires no tools—simply remove the old cartridges and set the new Ultra Series filters in place.","ULTRA SERIES DURABILITY: Designed for heavy-duty residential and commercial use. The robust trilobal media resists pleat collapse and fiber breakdown even under high-pressure conditions, making it an ideal long-term replacement for Pentair Clean & Clear Plus 520 maintenance kits.y our Ultra Series quality assurance for long-lasting performance and crystal-clear water."]