{"product_id":"105-sqft-filter-cartride-4-pack","title":"SuperPro Replacement Cartridge for Pentair Clean \u0026 Clear Plus 420, 4-Pack","description":"\u003cp\u003eThis is a set of four SuperPro FC-6470 filter cartridges for the Pentair Clean \u0026amp; Clear Plus 420. Each element is 105 sq ft, and the four together give the filter the 420 sq ft it is rated for.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBuy them as a set\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Clean \u0026amp; Clear Plus 420 splits the flow across four cartridges, so they wear at roughly the same rate. Replacing one or two and leaving the rest means the new elements take more than their share and the pressure gauge stops telling you anything useful. Changing the full set puts the filter back to a known baseline.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen to change\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eCartridges do not last forever. The tell is the interval between cleanings: when a filter that used to run a whole season between cleanings needs attention every few weeks, and the clean pressure never comes back down to where it started, the media is spent and cleaning will not recover it.\u003c\/p\u003e","brand":"Filbur","offers":[{"title":"Default Title","offer_id":48626706120916,"sku":"SPG-051-6470","price":340.06,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_37b53ba2-95ad-42b2-8131-a332b452c506.jpg?v=1788713899","url":"https:\/\/www.activepoolsupply.com\/products\/105-sqft-filter-cartride-4-pack","provider":"Active Pool Supply","version":"1.0","type":"link"}