HANXER® Heavy-Duty Pool Filter O-Ring - Replacement for 21" Sta-Rite System 3, Fits DE SD S7D75 S7M120 S7M400 S7MD60 S7MD72 S7S50, Direct Replacement for Part 24850-0008 / O-485

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About This 📏【Precision Leakproof Sizing】With exact dimensions (21.2" inside diameter × 22.36" outside diameter × 0.57" cross section), the O-ring creates a tight, gap-free seal. It prevents water from leaking out of the filter, preserving optimal system pressure and ensuring your filtration works efficiently to keep water clean. 🌟【Wide Compatibility with Multiple Models】Engineered for 21" Sta-Rite System 3 Modular Media SM Series filters, it also fits DE cartridge filter models S7D75 and S8D110. It’s a direct replacement for 8 common part numbers: 24850-0008, 248500008, APCO2311, O-485, STA1012821, 90-423-1485, ALDO-485-0, and STA-051-2809—no need to worry about mismatches. 🌟【Long-Lasting Airtight Seal】Designed as a direct, perfect fit for pool and spa filter tanks, this O-ring delivers airtight sealing that endures for years. It resists cracking, tearing, and premature wear, eliminating the need for frequent replacements and ensuring consistent performance season after season. 🌟【Heavy-Duty Rubber Material】Crafted from high-grade heavy-duty rubber, the O-ring strikes the perfect balance of flexibility and sturdiness. It’s built to handle the rigors of daily pool operation, from constant water contact to temperature fluctuations, without losing its shape or integrity. 🌟【Superior Durability】Swimming pool water—whether chlorinated or saltwater—will corrode inferior O-rings over time. This replacement part features a specially formulated compound that withstands daily pool use and chlorine/salt corrosion, maintaining its sealing performance even in harsh aquatic environments. 🌟【Enhanced Filtration Efficiency】A leaky O-ring leads to pressure loss, forcing your filter to work harder and increasing energy use. This O-ring’s tight seal keeps the system running at peak efficiency, reducing energy costs and minimizing wear on other filter components (like pumps and cartridges). 🌟【Universal for Pools & Spas】Whether you’re maintaining a backyard pool, in-ground spa, or small commercial aquatic setup, this O-ring adapts to your needs. Its robust design and wide compatibility make it a reliable choice for any application using compatible Sta-Rite filters. 🌟【Tool-Free Easy Installation】You don’t need technical skills to replace your old O-ring. Simply clean the filter body’s gasket area, apply PTFE-based lubricant (to enhance seal and prevent sticking), and fit the O-ring securely. The entire process takes minutes, getting your pool back in action fast. Overview Material : Rubber Nominal Inside Diameter : 21.2 Inches Item Diameter : 22.36 Inches Brand : HANXER Color : Black Show more