Hayward CX900H Star-Clear Plus Knob O-Ring

What This Part Is Used For
The Hayward CX900H Star-Clear Plus Knob O-Ring provides a sealing surface for compatible locking knob assemblies. It helps maintain a watertight connection at the filter head.

Why This Part Matters
A worn knob O-ring can allow minor leaks around hardware points. Replacing it restores proper sealing and clamping pressure. This supports consistent filter performance.

Key Features and Specifications

• Manufacturer part number CX900H
• Star-Clear Plus knob O-ring
• For compatible Hayward Star-Clear Plus systems
• Seal for locking knob assembly
• Service replacement seal

Installation and Fitment Guidance
Turn off the pump and relieve pressure before disassembly. Inspect for wear and lubricate lightly before installation. Confirm by manufacturer part number before ordering.

About the Hayward Brand
Hayward cartridge filters are widely used in residential pool systems. Their replacement seals and small hardware parts are supported for routine service. Genuine Hayward components help maintain proper system sealing.

Common Service Context
Often replaced during filter maintenance. Common when minor drips appear near knob assemblies.