{"product_id":"cartridge-100-sq-ft-inner-replacement-s7m120","title":"Sta-Rite Cartridge 100 Sq Ft Inner Replacement, S7M120, 25021-0200S","description":"\u003cp\u003eThe Sta-Rite 25021-0200S is the 100 square foot inner replacement cartridge for the System 3 model S7M120 filter. It is the genuine Sta-Rite element.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInner and outer\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe System 3 is built around a pair of elements, an inner and an outer, working together. This listing is the inner cartridge only, rated at 100 square feet. The outer cartridge is a separate part number, so check which one you actually need before ordering, and be aware that a filter running one new element against one exhausted one will not hold pressure the way a matched pair does.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen to replace\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eCartridge elements do not fail dramatically. They lose area gradually as the pleats pack, channel or collapse, and the sign is a filter that climbs back to high pressure sooner after each cleaning than it used to. When cleaning stops buying you much time, the element is done.\u003c\/p\u003e","brand":"Sta-Rite","offers":[{"title":"Default Title","offer_id":48629305311444,"sku":"STA-05-225","price":199.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_89b9e0a3-3f7d-48b9-9d01-18b02f94d101.jpg?v=1788762158","url":"https:\/\/www.activepoolsupply.com\/products\/cartridge-100-sq-ft-inner-replacement-s7m120","provider":"Active Pool Supply","version":"1.0","type":"link"}