IWIWE Tank O‑Ring 24850‑0008, Fits 21" Sta‑Rite System 3 Filter S7M120

Key features

• Perfect Fit & Exact Size: Replacement tank o‑ring part number 24850‑0008 (O‑485), cross‑reference numbers: 248500008, APCO2311, STA1012821, 90‑423‑1485, ALDO‑485‑0, STA‑051‑2809. Exact size: 21.2" inside diameter, 22.36" outside diameter, 0.57" cross section. Fits 21‑inch Sta‑Rite System 3 pool filter, including hot‑selling S7M120, S7D75, S7M400, S7MD60, S7MD72, S7S50 models.
• Tight Leak‑Proof Seal: Heavy‑duty flexible rubber creates tight seal for filter tank housing. Effectively stops water leakage, maintains stable system pressure and prevents pool water loss caused by aged, cracked or deformed original o‑rings.
• Pool‑Grade Rubber Build: Resist damage from chlorine, pool chemicals and salt‑water environment. Not easy to crack, harden or deform under long‑term pool and spa operation for extended service life.
• Simple Drop‑In Install: Precision‑molded to match OEM dimension without modification. Remove your worn seal and set the new o‑ring in place. For better sealing effect, apply PTFE‑based lubricant during installation to avoid twisting and future leaking.
• Cost‑Saving DIY Repair: Cost‑saving fix for filter tank leak issues. There is no need to replace the whole expensive filter assembly. Great for residential pool DIY maintenance, helping you cut repair cost and save service time.

Free shipping included. 30-day hassle-free returns.