{"product_id":"pentair_25022-0201s","title":"Pentair Large Cartridge for the System 3, S7M120 Filter | 25022-0201S","description":"\u003cp\u003eThe Pentair Large Cartridge (25022-0201S) is the OEM replacement filter element for the System 3 modular media filter, model S7M120. This is the 21 in. cartridge sized specifically for this tank.\u003c\/p\u003e\n\u003cp\u003eThis cartridge is the primary filtration media inside the S7M120 tank, trapping dirt and debris as water passes through the pleated element. The System 3 modular media design lets you replace the cartridge directly without removing or replacing the tank itself.\u003c\/p\u003e\n\u003cp\u003eThis is the larger, outer cartridge for the S7M120.  For the matching smaller, inner cartridge, see part number \u003ca href=\"https:\/\/poolaroo.com\/products\/pentair_25021-0200s\"\u003e\u003cstrong\u003e25021-0200S\u003c\/strong\u003e\u003c\/a\u003e.  Replace both to complete your filter service.\u003c\/p\u003e\n\u003cp\u003eFor a combo back of both filter cartridges, see the combo pack: \u003ca href=\"https:\/\/poolaroo.com\/products\/pentair_170145\"\u003e\u003cstrong\u003e170145\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 20px 0; border: 1px solid #ccc;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f8f9fa;\"\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003ePentair Part Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e25022-0201S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: white;\"\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003ePart Name\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eLarge Cartridge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f8f9fa;\"\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eFilter Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e21 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: white;\"\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eCompatible Model\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eS7M120\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f8f9fa;\"\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eQuantity Included\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eEach\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eFits Into\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 20px 0; border: 1px solid #ccc;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f8f9fa;\"\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eEquipment Line\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eModel \/ Part Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eNotes\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: white;\"\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003ePentair\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eSystem 3\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eS7M120\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e21 in. Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eCompatibility is based on Pentair parts documentation and available OEM records. This is not an exhaustive list. For certainty, verify the part number in your equipment's manual or on the original part itself before ordering.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003ePoolaroo Pro Tip\u003c\/h3\u003e\n\u003cp\u003eRinse the cartridge thoroughly with a garden hose between cleanings to clear trapped debris from the pleats — avoid pressure washers, which can tear the media and permanently reduce filtration surface area. If clean-filter pressure isn't restored after a full cleaning, it's time to replace the cartridge.\u003c\/p\u003e\n\u003c!-- wft:processed:manual:2026-08-24 --\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":54309090099475,"sku":"25022-0201S","price":391.22,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0920\/0687\/5411\/files\/pentair-large-cartridge-for-the-system-3-s7m120-filter-25022-0201s-2.webp?v=1787611256","url":"https:\/\/poolaroo.com\/products\/pentair_25022-0201s","provider":"Poolaroo","version":"1.0","type":"link"}