{"product_id":"pentair-r173573-cartridge-replacement-cnc-plus-320","title":"Pentair R173573 Cartridge Replacement - CNC Plus 320","description":"\u003cp\u003e\u003cstrong\u003eWhat This Part Is Used For\u003c\/strong\u003e\u003cbr\u003ePentair R173573 Cartridge Replacement - CNC Plus 320 is a replacement filter cartridge for Clean and Clear Plus 320 filtration systems. It provides mechanical filtration to remove debris and fine particles from pool water.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy This Part Matters\u003c\/strong\u003e\u003cbr\u003eA worn cartridge reduces water flow and filtration efficiency. Replacing it restores proper circulation and stable filter pressure. Maintaining clean filtration helps protect pumps, heaters, and automation components.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features and Specifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eManufacturer part number: R173573\u003c\/li\u003e\n\u003cli\u003eReplacement cartridge element\u003c\/li\u003e\n\u003cli\u003eFor Clean and Clear Plus 320 filter systems\u003c\/li\u003e\n\u003cli\u003eCartridge style filtration\u003c\/li\u003e\n\u003cli\u003eRemoves 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\u003eShut off pump and relieve filter pressure before opening the tank. Inspect tank O-rings and sealing surfaces during replacement. Confirm by manufacturer part number before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAbout the Pentair Brand\u003c\/strong\u003e\u003cbr\u003ePentair manufactures Clean and Clear Plus cartridge filters widely used in residential pools. Their filtration systems are known for serviceability and strong water clarity. Pentair supports long term maintenance with OEM replacement cartridges. The brand is trusted by pool professionals nationwide.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon Service Context\u003c\/strong\u003e\u003cbr\u003eThis cartridge is typically replaced during seasonal filter maintenance or when pressure remains elevated after cleaning. It is also installed during full filter rebuilds.\u003c\/p\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":52078597898514,"sku":"R173573","price":130.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/2279\/1186\/files\/PENR173573_0.jpg?v=1772562682","url":"https:\/\/www.aquaterrabackyard.com\/products\/pentair-r173573-cartridge-replacement-cnc-plus-320","provider":"Aqua Terra Backyard","version":"1.0","type":"link"}