This design allows for easy and thorough rinsing. Perfect Match: Compatible with Pentair Clean & Clear Plus 420/160301/178584 pool filter. Replace Pentair R173576, Pleatco PCC105/PCC105-PAK4, Waterway Crystal Water 425, Unicel C-7471/C-7471-4, Filbur FC-1977, Pure N Clean PC-1977/PC-1977P/PC-6470 and more.
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