{"product_id":"pentair_r173576","title":"Pentair Cartridge 420 sq. ft. | Clean \u0026 Clear Plus Filter 420 sq. ft. | R173576","description":"\u003cp\u003eThe Pentair R173576 is the OEM replacement filter cartridge for the Clean \u0026amp; Clear Plus 420 sq. ft. cartridge filter. Four cartridges are required per filter unit — this listing is for one individual cartridge.\u003c\/p\u003e\n\u003cp style=\"background-color: #fff3cd; border: 2px solid #FFEAA7; padding: 15px; border-radius: 5px; margin: 15px 0; color: #856404;\"\u003e\u003cstrong\u003e⚠️ IMPORTANT: 4 CARTRIDGES REQUIRED PER FILTER\u003c\/strong\u003e\u003cbr\u003eThe Clean \u0026amp; Clear Plus 420 sq. ft. filter requires 4 of these cartridges for a complete service. This listing is for one (1) cartridge. Order 4 to complete a full replacement.\u003c\/p\u003e\n\u003cp style=\"background-color: #fff3cd; border: 2px solid #FFEAA7; padding: 15px; border-radius: 5px; margin: 15px 0; color: #856404;\"\u003e\u003cstrong\u003e⚠️ IMPORTANT: FILTER MANUFACTURE DATE APPLIES\u003c\/strong\u003e\u003cbr\u003eThis cartridge is confirmed for Clean \u0026amp; Clear Plus 420 sq. ft. filters manufactured \u003cstrong\u003eafter November 1998.\u003c\/strong\u003e Verify your filter's manufacture date before ordering.\u003c\/p\u003e\n\u003cp\u003eThe R173576 cartridge is the filtration element inside the Clean \u0026amp; Clear Plus CCP420 housing. As pool water passes through the pleated filter media, the cartridge captures debris, oils, and fine particulates before the water returns to the pool. When cartridges become clogged or the filter media degrades, flow rate drops and water clarity suffers — replacing all four cartridges at the same time restores the filter to full rated capacity.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 20px 0; border: 1px solid #ccc;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f8f9fa;\"\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003ePentair Part Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eR173576\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003ePart Name\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eCartridge, 420 sq. ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f8f9fa;\"\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eQuantity Included\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e1 cartridge (4 required per filter — order accordingly)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eFits Into\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 20px 0; border: 1px solid #ccc;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f8f9fa;\"\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eEquipment Line\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eModel \/ Part Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eNotes\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003ePentair\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eClean \u0026amp; Clear Plus Filter 420 sq. ft. — Clean \u0026amp; Clear Plus Series\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eCLEAN \u0026amp; CLEAR PLUS 420\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e420 sq. ft., 4 required; filters manufactured after 11\/98\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eCompatibility is based on Pentair parts documentation and available OEM records. This is not an exhaustive list. For certainty, verify the part number in your equipment's manual or on the original part itself before ordering.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003ePro Tip\u003c\/h3\u003e\n\u003cp\u003eAlways replace all four cartridges as a set. Mixing new and used cartridges creates uneven flow distribution across the filter elements, which accelerates wear on the new cartridges and reduces overall filtration efficiency. While the filter is open for service, inspect the tank O-ring and internal manifold for wear — addressing those components during the same service visit avoids a repeat teardown.\u003c\/p\u003e\n\u003c!-- wft:processed:manual:2026-04-03 --\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":53912383848723,"sku":"R173576","price":176.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0920\/0687\/5411\/files\/PENR173576_0.jpg?v=1772793809","url":"https:\/\/poolaroo.com\/products\/pentair_r173576","provider":"Poolaroo","version":"1.0","type":"link"}