I ordered 2, and swapped them out...one in use, one being cleaned. Every Toread Pool or SPA filter is NSF50 Certified by IAPMO. (window.AmazonUIPageJS ? /*! @media all and (orientation:landscape){#btf-sub-nav-tab{display:none}}#btf-sub-nav-tab{z-index:101;height:52px;box-shadow:0 1px 6px 0 rgba(32,33,36,.28);background:#fff;display:table;table-layout:fixed;color:#111;width:100%}#btf-sub-nav-tab.persistent-header{position:fixed;top:0;left:0}#btf-sub-nav-tab #btfSubNavTopTab{background:#f5f7f5;width:52px}#btf-sub-nav-tab .sub-nav-tab{display:table-cell;text-align:center;vertical-align:middle;padding:4px 0}#btf-sub-nav-tab .sub-nav-tab .tab-content{display:inline-block;overflow:hidden}#btf-sub-nav-tab .sub-nav-tab .top-tab-content{line-height:0}#btf-sub-nav-tab .sub-nav-tab.active{font-weight:700;border-bottom:4px solid #e55d16;padding-bottom:0}#btf-sub-nav-tab .sub-nav-tab.active .tab-content{color:#e55d16} (window.AmazonUIPageJS ? Quick View. The Filbur FC-3710 is the correct compatible replacement for the following:. Ft. SwimClear Cartridge Filter Pentair Clean & Clear 100 Sq Ft Cartridge Filter (CC100) Use C-4607. The Unicels do a sufficient job at filtering, while giving you a reasonable time interval between cleanings, (a couple of weeks, for my pool). .payment-options-container{padding-top:15px;padding-bottom:15px}.payment-options-container .payment-options-expander-heading .payment-options-expander-icon-container{transition:all .4s ease;padding-top:0!important;padding-left:0!important}.payment-options-container .payment-options-expander-heading .payment-options-expander-icon{transition:all .4s ease}.payment-options-container .payment-options-expander-heading .payment-options-expander-icon.rotate{transform:rotateZ(-180deg);transition:all .4s ease}.payment-options-container .payment-options-expander-heading .payment-options-expander-heading-image-container{padding-top:0!important;padding-bottom:0!important}.payment-options-container .payment-options-expander-heading 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