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Hayward SX200Z5 O-Ring (Air Relief / Drain Port)
Part Number: SX200Z5
Description
Replacement O-ring designed for use in certain Hayward sand filters and DE filters. It seals the air relief valve or drain pipe port, helping prevent leaks and ensuring proper pressure retention.
Compatibility & Fitment
- Fits Hayward filter models in the S240, S200, S160T sand filter series, and MicroClear or Super StarClear configurations.
- Designed for use when the original O-ring is cracked, flattened, leaking or removed during service.
- Direct drop-in replacement for systems specifying the SX200Z5 part number.
Features & Specifications
- Material: Pool grade elastomer suitable for chlorinated and salt water environments.
- Size: Internal diameter ~5/8″; outer diameter ~13/16″; cross-section ~3/32″.
- Ensures proper seal of air relief valve or drain port to maintain filter pressure and prevent water bypass.
Installation Notes
Turn off the pump and relieve system pressure. Remove the air relief or drain nut assembly, remove the old O-ring, clean the groove and sealing surface, lightly lubricate the new O-ring with pool-safe lubricant, seat it evenly, reinstall the nut or cap, restore flow and inspect for leaks.
Maintenance Tip
Inspect the O-ring each service interval. Replace immediately if signs of flattening, cracking or leaks appear. A fresh O-ring helps maintain filter efficiency and prevents premature tank or valve damage.

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