Hayward Star-Clear II Filter Head Dome Lid w/ Air Relief | CX800C
Hayward Products
SKU: CX800C
Hayward CX800C – Filter Head Assembly with Air-Relief
Product Overview
The Hayward CX800C is a factory-replacement filter head designed for the StarClear II™ cartridge filter series. It includes an integrated air-relief vent and offers a durable, precisely-engineered cover assembly to maintain optimal filtration performance.
Key Features
- Direct-replacement head assembly for compatible StarClear II™ C800 filter systems.
- Built-in air-relief vent allows trapped air to escape and supports proper filter priming.
- Robust thermoplastic construction for longevity in pool chemical environments.
- Molded mounting features designed for secure bolt-down and sealing with filter body.
Technical Specifications
- Part Number: CX800C
- Application: Head assembly (filter lid + air relief) for C800 cartridge filters.
- Weight: Approx. 3.2 lb.
- Material: Engineered plastic cover, pressure-rated for residential pool use.
Compatibility & Installation Notes
This filter head is designed for use with the Hayward StarClear II™ C800 cartridge filter tank. Before ordering, verify your existing filter model and ensure the bolt-hole pattern and vent placement match. Proper installation helps restore full filter performance and prevents air-lock or bypass issues.
Installation Instructions
- Turn off the pump, relieve any pressure in the system, and drain as needed before servicing the filter.
- Remove the old head assembly, clean the sealing flange on the filter tank, and inspect for damage or corrosion.
- Place the new CX800C head on the tank, align bolt holes, insert bolts, and tighten evenly in a star pattern to specified torque.
- Prime the pump, restore circulation, monitor pressure, and check for any leaks or presence of air in the filter housing.
Troubleshooting
- Air bubbles in the filter or pump basket: Ensure the air-relief vent is open and functioning, and check that the new head is sealed properly.
- Leak at head joint: Verify flange surface is clean, the gasket is properly installed, bolts are evenly torqued, and there is no damage to tank threads.
- Reduced flow or pressure drop: Confirm all ports are correctly aligned and the head was installed correctly; check cartridge condition and tank internals.
Maintenance Tip
Inspect the filter head, bolts, and sealing gasket during annual service. If the vent assembly shows wear or the head has cracks, replace immediately. A well-sealed head assembly prevents air-ingress and helps maintain efficient filtration. Replacing the head at first sign of damage helps avoid costly downtime or compromised water clarity.
Questions about returns? View our return policy.
Hours Of Operation:
Monday - Friday: 7:00 am to 5:00 pm Phoenix Time
Saturday: 8:00 am to 2:00 pm
Sunday: Closed
- We do not ship on Saturday or Sunday.
- Orders totaling more than $300 will require signature confirmation upon delivery.
- We process and prepare orders for shipment within 1 business day. Please note that many other pool supply retailers require 3–5 days of handling time before shipping.
- Orders placed after 1:00 pm Phoenix Time may not be eligible for same-day shipment.
- Expedited shipping options are available at checkout.
Return Policy:
- Products that are received damaged will receive a refund in store credit.
- Most products are eligible for return within 30 days of receipt, except where noted below.
- To initiate a return, please complete an RMA form prior to sending your item back.
- Original shipping costs are non-refundable and will be deducted from the return credit.
- Items returned missing accessories or original packaging, or that are not in the same condition as received, may be subject to a restocking fee of up to 100% depending on the condition of the item upon return.
- Some returns will be charged an automatic 15% restocking fee.
- We are unable to issue refunds for items that have been damaged or rendered inoperable due to installer error.
- Please complete the return form to receive your RMA number and return shipping label.
- Chemical products are not eligible for return under any circumstances.
- The Pentair Colorsync 618031 is not eligible for return.
- Pool cleaners are not eligible for return.
- Opened seals and o-rings are not eligible for return.
- Capacitors are not eligible for return.
- Plastic popup tools are not eligible for return.
- Automation components and circuit boards are not eligible for return.
- If a light is returned due to a reported malfunction and is found to be fully operational upon testing, return shipping costs and a restocking fee will be deducted from the refund.
- Orders refused at the time of delivery will be subject to the original shipping costs being deducted from the refund.
Related Products
