{"product_id":"cartridge-18-sqft","title":"Pleatco PRB18-4 Filter Cartridge, 18 Sq Ft","description":"\u003cp\u003eThe Pleatco PRB18-4 is a replacement filter cartridge rated at 18 square feet of media area. Pleatco lists it for Standard and High SF Module Filters in the MX Series, for Lifeguard CL 29x housings and for Rainbow filters, with Pentair given as the filter manufacturer.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen to change a cartridge\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA cartridge does not fail all at once. Pressure creeps up, flow drops off, and cleaning brings the pressure down for a shorter stretch each time. Once a wash no longer restores normal running pressure, the pleats are loaded or broken down and a new element is the fix.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCheck the size first\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis listing gives an outside diameter of 2-7\/8 in and a length of 29-1\/4 in. Cartridge families reuse part numbers across several sizes, so measure the element you are replacing and compare it against those numbers before ordering.\u003c\/p\u003e","brand":"Pleatco","offers":[{"title":"Default Title","offer_id":48634257473748,"sku":"PLE-051-9246","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_14e8a2e3-d0dc-4196-bcbe-ffd785fe2952.jpg?v=1788827796","url":"https:\/\/www.activepoolsupply.com\/products\/cartridge-18-sqft","provider":"Active Pool Supply","version":"1.0","type":"link"}