StarClear™ Plus Filter Head with Vent Valve

Hayward Filter Head for StarClear Plus Cartridge Filters | CX900B

Regular price$183.99
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SKU:
CX900B
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About This Item

The Hayward Filter Head (CX900B) is the OEM replacement filter head for the StarClear Plus cartridge filter series, covering 120 sq. ft. and 175 sq. ft. models.

This filter head assembly houses the integrated directional vent valve, which allows trapped air to be purged from the filter tank during start-up and after servicing. Replacing a cracked, warped, or leaking filter head restores a proper pressure seal at the top of the tank and ensures accurate pressure gauge readings during operation.

Specifications

Hayward Part Number CX900B
UPC 610377209427

Fits Into

Brand Equipment Line Model / Part Number Notes
Hayward 120 Sq. Ft. StarClear Plus Filter W3C1200
Hayward StarClear Plus Cartridge Filter 120 Sq. Ft. W3C12002
Hayward StarClear Plus Cartridge Filter 175 Sq. Ft. 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

Before reinstalling the filter head, inspect the tank O-ring seated in the upper tank groove. Even a minor flat spot or nick on that O-ring can cause a persistent weep leak at the head joint once the system is back under pressure. Replace it at the same time as the filter head to avoid a second disassembly.

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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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