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Why an In-Line System Matters: A built-in In-Line port is hidden
repeat endlessly
deep-soak quarterly
Matching that fitting style matters more than matching square footage: a cartridge with the right filtration area but the wrong bottom connection won't seal
Unicel 5CH-35 | 35 sq ft Top Load Spa Filter Spas & Pools Why an In-Line System Matters:The Unicel 5CH 35 is a top load spa filter cartridge delivering 35 square feet of filtration across 203 pleats of Reemay 2033 polyester media. Built to meet or exceed OEM specifications, it's a direct replacement for Elite Spas by Maax, Marquis, and other systems using this cartridge. Filtration is the quiet backbone of clean spa water. Every soak leaves behind body oils, lotions, hair, and fine debris, and the cartridge is what removes all of it