{"product_id":"cartridge-135-sqft","title":"Unicel 135 sq ft Filter Cartridge","description":"\u003cp\u003eThe Unicel UHD-SR135 is a 135 square foot replacement cartridge element measuring 8-11\/16\" across the outside diameter and 34-1\/2\" long. It is listed as the replacement for the Sta-Rite WC108-53S1X element.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCheck the two numbers\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eCartridges are chosen by size, not by filter model alone. Pull the old element, measure the outside diameter and the overall length, and match them to the 8-11\/16\" and 34-1\/2\" figures here. Getting either wrong leaves the element loose in the tank, and water finds its way past instead of through the media.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCleaning and replacing\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eAn element like this is rinsed and put back in service several times before it is finished. The signal that it is done is filter pressure that climbs back to where it was within days of a cleaning, or pleats that have gone brittle, matted or torn. At that point no amount of cleaning restores the flow.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat you are buying\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis is supplied under the Unicel name and carries the Unicel number UHD-SR135. It is a replacement element for a Sta-Rite filter rather than a Sta-Rite branded cartridge.\u003c\/p\u003e","brand":"Unicel Filter Cartridges","offers":[{"title":"Default Title","offer_id":48633713590484,"sku":"UNI-60-5225","price":134.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_a0d150ad-7a70-42a2-9690-3bc3b803baaf.jpg?v=1788812380","url":"https:\/\/www.activepoolsupply.com\/products\/cartridge-135-sqft","provider":"Active Pool Supply","version":"1.0","type":"link"}