POOLPURE Spa Filter Replacement | Replaces Watkins 303279, PFF42TC-P4, 5CH-37

Overview

Elevate your spa experience with the POOLPURE Spa Filter Replacement. This compatible cartridge mirrors key dimensions and fitment while delivering enhanced filtration through thoughtful design and durable materials. Designed for ease of maintenance, it pairs well with a range of popular filter models, giving you a reliable path to clear, inviting water.

With a length of 9 3/8 inches and an outside diameter of 5 1/4 inches, the cartridge features a closed top with a string handle and a bottom MPT thread of 1 1/2 inches. The filtration area spans 42 square feet, engineered to efficiently capture particulates such as hair, dust, leaves, and sediment as your spa water circulates through the filter. The result is a more consistent flow and a water profile that feels cleaner on the skin.

Compatibility and Certification

• Engineered as a compatible replacement for Watkins 303279, 78460, PFF42TC-P4, Filbur FC-2402, ACT-50SQFLTR, LSX1057, Pure N Clean PC-2402, SD-01322, and Unicel 5CH-37
• Noted as a PHTA member product, aligning with industry filtration standards for dependable performance
• NSF ANSI 50 certification and IAPMO proven quality support safer, cleaner water in your spa

Performance and Care

• Dirt-Locking technology enhances contaminant capture compared with standard fabrics
• Trilobal Filtration Fabric structure improves debris handling and ease of cleaning
• Designed for a service life of roughly 1 to 2 years with proper care; not intended for backwashing
• Trusted by millions of pool and spa owners worldwide for reliable filtration

Real World Use and Value

In regular spa maintenance, this replacement cartridge allows you to maintain clear water and steady circulation. The 2 pack option provides added value for seasonal use or multi-unit setups, helping you stay equipped across maintenance cycles without interrupting your routine. While there are many compatible models, the POOLPURE cartridge is presented as an independent option that respects the original part numbers while offering its own performance benefits.

Note that this is a compatible replacement and not an original manufacturer product. Observing the not for backwashing guidance helps prevent cartridge damage and preserves filtration efficiency over time.