{"product_id":"sta-rite-replacement-cartridge-set-for-sta-rite-system-3-400-sq-ft-s7m400","title":"Sta-Rite OEM Replacement Cartridge Set for System:3 Filter, 400 Sq Ft","description":"\u003cp\u003eThis is the OEM replacement cartridge set for the Sta-Rite System:3 S7M400 modular media filter, sold under part number 170146.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTwo cartridges, one part number\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe 400 square foot System:3 gets its filter area from a pair of cartridges, one smaller cartridge inside and one larger cartridge around it. This kit supplies one of each, so a single order covers the whole filter.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen to change them\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eCartridges that will not wash back to clean starting pressure are finished. Because both cartridges in the S7M400 see the same water and the same running hours, changing them as a pair keeps the filter working evenly and saves opening the tank twice.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCheck the model\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eCartridge sets are matched to the filter they were built for. Confirm your filter is the 400 square foot S7M400 before ordering.\u003c\/p\u003e","brand":"Sta-Rite","offers":[{"title":"Default Title","offer_id":48627205472468,"sku":"STA-051-6579","price":658.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_154b6af1-5dfd-4786-af21-f007a40cfb69.png?v=1788720063","url":"https:\/\/www.activepoolsupply.com\/products\/sta-rite-replacement-cartridge-set-for-sta-rite-system-3-400-sq-ft-s7m400","provider":"Active Pool Supply","version":"1.0","type":"link"}