Hayward Knob Washer Set of 2 for StarClear Plus Cartridge Filters | CX900WPAK2
Hayward

Hayward Knob Washer Set of 2 for StarClear Plus Cartridge Filters | CX900WPAK2

$21.99
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$9.99 flat shipping on orders under $100.
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SKU:
CX900WPAK2

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About This Item

The Hayward Knob Washer (CX900WPAK2) is the OEM replacement washer for the filter lid knob on Hayward StarClear Plus cartridge filters, sold as a set of 2.

These washers seat under the lid knob assembly to provide a secure, rattle-free closure on the filter tank lid. Replacing worn or damaged washers restores proper knob function and helps maintain a firm lid seal during filter operation.

Specifications

Hayward Part Number CX900WPAK2
Pack Quantity 2 washers
UPC 610377243155

Fits Into

Brand Equipment Line Model / Part Number
Hayward 120 Sq.Ft. StarClear Plus Filter (Open Line) W3C1200
Hayward StarClear Plus Cartridge Filter 120 Sq.Ft. (Open Line) W3C12002
Hayward StarClear Plus Cartridge Filter 175 Sq.Ft. (Open Line) W3C17502

Compatibility is based on Hayward parts documentation and available OEM records. This is not an exhaustive list. For certainty, verify the part number in your equipment's manual or on the original part itself before ordering.

Poolaroo Pro Tip

When servicing the filter lid, inspect both washers together — they typically wear at the same rate. Replacing both at the same time (as this pack allows) avoids a return service call caused by a second failure shortly after the first.

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Hayward

About Hayward

Founded in 1925, Hayward has evolved from a small specialty metal shop in Brooklyn into a global powerhouse in residential and commercial pool equipment. For nearly a century, Hayward has pioneered advancements that revolutionized the swimming pool industry—most notably by transitioning pool equipment from heavy, rust-prone metals to durable, corrosion-resistant thermoplastics in the 1960s.

Today, Hayward is synonymous with reliable, energy-efficient performance and cutting-edge technology. From the legendary Super Pump to their modern Omni smart pool automation platforms, Hayward builds equipment designed to give pool owners total control and peace of mind. By focusing on sustainability, category-leading energy efficiency, and seamless smart home integration, Hayward empowers DIY homeowners to spend less time maintaining their water and more time enjoying their backyard oasis.

Why We Trust Hayward
A Century of Innovation: Over 100 years of engineering excellence, leading the industry from early metal valves to modern smart pool technology.
Unmatched Energy Efficiency: Pioneers of ultra-high efficiency variable-speed pumps and heating systems, saving pool owners money on monthly energy bills.
Total Smart Control: Creators of the Omni automation platform, giving users seamless, wireless control of pool chemistry, lighting, and temperature from their smartphones.
American Manufacturing Focus: The vast majority of Hayward products and components are proudly manufactured in United States facilities, ensuring strict quality control and dependable performance.

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