Hayward CX250G Star-Clear Filter Locking Knob (Replacement)
The Hayward CX250G is a genuine OEM locking knob used on Hayward Star-Clear cartridge filters.
This knob secures the filter head to the filter body, helping maintain a tight seal for proper filtration. Replace it if the original knob
is cracked, stripped, missing, or no longer tightens smoothly.
Fits / Compatibility
- Hayward Star-Clear cartridge filter models: C250, C500, C750, C100
What It Fixes
- Filter lid/head wont tighten or stay secured
- Cracked, sun-brittle, or stripped locking knob
- Seepage at the head/body area caused by an improperly secured head (after confirming O-rings are in good condition)
Key Details
- Part Number: CX250G
- Part Type: Filter Parts
- GTIN/UPC: 610377004558
- Replacement Part Warranty (typical): 6 months (parts only)
Installation Notes
- Turn off the pump and relieve pressure before opening the filter.
- Install the new locking knob and tighten per the filters instructionsdo not overtighten.
- If you still have leaks after replacement, inspect the filter head O-ring/sealing surfaces and replace worn seals as needed.
Related Products
- Hayward CX250G Locking Knob (search)
- Hayward Star-Clear Filter Parts (search)
- Hayward C250 Filter Parts (search)
- Hayward C500 Filter Parts (search)
- Star-Clear Lid/Head O-Rings (search)
- Silicone O-Ring & Gasket Lubricant (search)
Maintenance Tips
- Keep the filter head O-ring clean and lightly lubricated with silicone-based lube to improve sealing and reduce binding.
- Do not use tools to over-tighten plastic knobssnug and evenly seated is best.
- If the knob becomes hard to turn, clean debris from threads/seating surfaces before forcing it.
