{"product_id":"heavy-duty-pool-filter-o-ring-replacement-for-21-i","title":"Heavy Duty Pool Filter O Ring Replacement for 21 Inch Sta Rite System 3 Pools and Spas Fits DE SD S7D75 S7M120 S7M400 S7MD60 S7MD72 S7S50 Filters Airtight Seal Long Lasting Rubber Ring 24850-0008 O-485","description":"\u003cdiv\u003eSingle 21 inch pool filter O-ring for System 3\u003cbr\u003e\n✔️ Fits 21 inch System 3 tanks; 24850-0008 compatible \u003cp\u003eThis heavy-duty O-ring replacement delivers a tight, airtight seal for 21-inch filter tanks found in many pools and spas. It’s designed to withstand chlorine and salt environments and is a common fit for 21-inch System 3 modular tanks and compatible DE and cartridge filters.\u003c\/p\u003e ✅ ID 21.2 in, OD 22.36 in, CS 0.57 in\u003cbr\u003e\n✅ Heavy-duty rubber resists chlorine and salt damage\u003cbr\u003e\n✅ Airtight seal prevents leaks and ensures proper filtration\u003cbr\u003e\n✅ Compatible with 24850-0008, 248500008, O-485 and similar 21 in filter setups\u003cbr\u003e \u003cp\u003e💡 What is a pool filter O-ring used for and why replace it?\u003c\/p\u003e\n\u003cp\u003eReplacing the O-ring keeps the system airtight and reduces water loss and pressure drop.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ehandy for 21-inch filter tanks and standard DE or cartridge setups\u003c\/li\u003e\n\u003cli\u003edurable rubber with chlorine and salt resistance\u003c\/li\u003e\n\u003cli\u003eeasy to install with PTFE-based lubricant for best seal\u003c\/li\u003e\n\u003cli\u003elong-lasting replacement that helps prevent leaks\u003c\/li\u003e\n\u003c\/ul\u003e \u003c\/div\u003e","brand":"Amazon","offers":[{"title":"Default Title","offer_id":48022995402987,"sku":"VXB0D6V9TRRD","price":59.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/3268\/0683\/files\/pool-filter-o-ring-21-inch-rubber-seal.jpg?v=1775266427","url":"https:\/\/vxb.com\/products\/heavy-duty-pool-filter-o-ring-replacement-for-21-i","provider":"VXB Bearings","version":"1.0","type":"link"}