The OEM Waterway Filter Lock Nut 550-7500 is a heavy-duty fastening component precision-engineered for Waterway ClearWater II cartridge and D.E. filter systems. This lock nut anchors the filter lid firmly to the tank body, creating a leak-resistant seal that is essential for maintaining correct filtration pressure and consistent performance. Made from rugged materials formulated to resist cracking, UV fading, and chemical degradation, it provides a dependable solution for both routine part replacement and long-term system upkeep. With compatibility across numerous ClearWater II models, this OEM lock nut ensures reliable filtration operation in residential and commercial pool settings alike.

Key Benefits

• Designed for ClearWater II Systems: Precision-manufactured for Waterway ClearWater II cartridge and DE filter assemblies, delivering an exact fit and consistent, reliable operation.
• Anchors the Filter Lid Securely: Fastens the lid tightly to the tank body, forming a dependable seal that eliminates leaks and maintains proper filtration pressure.
• Engineered for Pool Environments: Fabricated from tough, pool-safe materials that resist cracking, UV-induced fading, and degradation from chemical exposure over extended periods.
• Maintains Structural Integrity: Keeps the filter tank assembly properly secured, preserving both the physical structure and operational reliability of the entire filtration unit.
• Ideal for Preventive Maintenance: Perfect for replacing cracked, stripped, or deteriorated lock nuts to bring aging filter systems back to full working condition.

What's Included

• Waterway 550-7500 Lock Nut

Compatibility

• Waterway ClearWater II Cartridge Filters
• Waterway ClearWater II DE Filters

Specifications

• Brand: Waterway
• Part Number: 550-7500
• Bottom Outside Diameter: 17"
• Bottom Inside Diameter: 17-5/8"
• Top Diameter: 16"
• Entire Diameter: 20-3/8"

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