{"product_id":"pentair-r173576-cartridge-replacement-cnc-plus-420","title":"Pentair R173576 Cartridge Replacement - CNC Plus 420","description":"\u003cp\u003e\u003cstrong\u003eWhat This Part Is Used For\u003c\/strong\u003e\u003cbr\u003ePentair R173576 Cartridge Replacement - CNC Plus 420 is a replacement filter cartridge for Clean and Clear Plus 420 systems. It filters circulating pool water to remove debris and suspended particles.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy This Part Matters\u003c\/strong\u003e\u003cbr\u003eOver time, cartridges lose efficiency and restrict system flow. Installing a new cartridge restores proper filtration and consistent turnover rates. Clean filtration supports balanced water chemistry and equipment longevity.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features and Specifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eManufacturer part number: R173576\u003c\/li\u003e\n\u003cli\u003eReplacement cartridge element\u003c\/li\u003e\n\u003cli\u003eFor Clean and Clear Plus 420 filter systems\u003c\/li\u003e\n\u003cli\u003eCartridge filtration design\u003c\/li\u003e\n\u003cli\u003eCaptures debris and fine particles\u003c\/li\u003e\n\u003cli\u003eConfirm exact filter model before ordering\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eInstallation and Fitment Guidance\u003c\/strong\u003e\u003cbr\u003eTurn off pump and relieve pressure before removing the filter lid. Inspect internal components and clean the tank before installing the new cartridge. Confirm by manufacturer part number before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAbout the Pentair Brand\u003c\/strong\u003e\u003cbr\u003ePentair produces cartridge filtration systems used throughout residential and commercial pools. Their Clean and Clear Plus series is common on professional service routes. Pentair maintains strong distribution of OEM cartridges. The brand is recognized for dependable pool filtration.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon Service Context\u003c\/strong\u003e\u003cbr\u003eThis cartridge is commonly replaced during annual service or when flow rates drop. It is also installed when upgrading from worn aftermarket elements.\u003c\/p\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":52078597931282,"sku":"R173576","price":159.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/2279\/1186\/files\/PENR173576_0.jpg?v=1772562684","url":"https:\/\/www.aquaterrabackyard.com\/products\/pentair-r173576-cartridge-replacement-cnc-plus-420","provider":"Aqua Terra Backyard","version":"1.0","type":"link"}