Hayward Star-Clear Filter Head Dome w/ Air Relief Valve | CX250C
Hayward Products
SKU: CX250C
Hayward CX250C Star-Clear Filter Head Dome with Air Relief Valve
The Hayward CX250C is a genuine replacement filter head dome for Hayward Star-Clear cartridge filters. This is the top “dome” assembly that secures to the tank and includes the manual air relief (vent) valve for purging trapped air during startup and service.
Fits / Compatibility
- Hayward Star-Clear cartridge filters: C250, C500, C750, C1000
- Commonly used wherever the parts diagram calls for Filter Head (Dome) with Air Relief Valve
Key Features
- OEM Star-Clear replacement dome/top head
- Includes the air relief/vent valve for easy air bleeding
- Head can be positioned/rotated during installation to place the air relief where it’s easiest to access
- Restores reliable sealing and safe operation when the original head is cracked, warped, or worn
What It Fixes
- Cracked or leaking filter head
- Air relief area damage or chronic air bleeding issues due to a compromised head
- Head that no longer seats evenly after years of heat/UV exposure
What’s Included
- (1) Hayward CX250C filter head dome
- (1) Integrated air relief/vent valve (installed on the head)
Note: The tank head gasket/O-ring (the seal between the head and tank) is typically purchased separately if you’re addressing a leak or doing a full reseal.
Specs (Quick Reference)
- Part Number: CX250C
- Part Type: Filter Parts
- GTIN: 610377004534
- Approx. Shipping Weight: 7.5 lb
Installation Notes
- Turn off the pump and relieve pressure before opening the filter.
- Inspect and replace the head gasket/O-ring if it’s flattened, nicked, or stiff.
- Clean all sealing surfaces before reassembly and tighten the locking knob evenly (do not overtighten).
- After startup, open the air relief until you get a steady stream of water, then close it.
Related Products
- Hayward CX250C (search)
- Hayward CX250F Filter Head Gasket (search)
- Hayward ECX1322A Air Relief / Vent Valve (search)
- Hayward CX250G Locking Knob (search)
- Hayward CX250Z7 Locking Knob O-Ring (search)
- Hayward Star-Clear Replacement Cartridges (search)
Maintenance Tips
- Open the air relief during startup to purge trapped air—running with air in the tank can reduce flow and performance.
- Keep the head gasket clean and lightly lubricated with silicone-based pool lube to help prevent pinching and leaks.
- Don’t use tools to overtighten the locking knob—snug and evenly seated is best.
- If you see seepage at the head/tank seam, replace the gasket/O-ring rather than forcing the head tighter.
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.
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