550-7500 | Waterway Filter Lock Nut For ClearWater II Filters

OEM Waterway Filter Lock Nut 550-7500 is a high-strength replacement component engineered for Waterway ClearWater II cartridge and D.E. filter systems. This lock nut securely fastens the filter lid to the tank, ensuring a leak-resistant seal critical for proper filtration performance. Constructed from durable materials to withstand pool chemicals and pressure, it is a reliable part for both routine maintenance and long-term system efficiency. Compatible with a wide range of ClearWater II models, this OEM nut helps maintain filtration integrity in residential and commercial pool environments.

Highlights

• Fits ClearWater II Filter Models: Specifically designed for use with Waterway ClearWater II cartridge and DE filter systems for exact fit and dependable performance.

• Secures Filter Lid Tightly: Ensures the filter lid is properly fastened, forming a reliable seal that prevents leaks and supports optimal filtration pressure.

• Built for Harsh Pool Conditions: Manufactured from rugged, pool-safe materials that resist cracking, fading, and chemical exposure over time.

• Essential for System Integrity: Helps preserve the filter tank’s structural and operational integrity by maintaining secure lid placement.

• Long-Term Maintenance Solution: Ideal for replacing worn or cracked lock nuts to restore proper function to aging filtration systems.

Includes

• (1) Waterway 550-7500 Lock Nut

Compatibility

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

Dimensions

• Bottom Outside Diameter: 17"
• Bottom Inside Diameter: 17-5/8"
• Top Diameter: 16"
• Entire Diameter: 20-3/8"

Note: See product pictures for a visual of the dimensions

Additional Info

Find the Right Lock Nut for ClearWater II Filters

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Maintenance and Leak Prevention Queries

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Specs and System Fitment

fits all waterway clearwater ii filters

durable plastic nut for sealing filter tops

locks down lid to maintain filter pressure

high quality thread for long-term use

oem waterway part number 550-7500

Diagram