Hayward Star-Clear Filter Lock Knob In stock$3499
Quick overview
- Genuine Hayward Factory part CX250G for the Star-Clear filter line.
- Star-Clear coverage Listed for the C-250, C-500, C-750 and C-1000 cartridge filters.
- Holds the head down The knob is what draws the filter head onto the tank and keeps the seal loaded.
- Direct replacement Fits the existing tie rod, no other parts needed.
- Common failure point Threads strip and the plastic goes brittle after years of sun and handling.
- Cheap fix for a leaking head A knob that will not tighten is often mistaken for a failed tank o-ring.
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Product details
The Hayward CX250G is the lock knob for Star-Clear cartridge filters, covering the C-250, C-500, C-750 and C-1000 models.
What it does
The knob threads onto the tie rod and pulls the filter head down onto the tank. That clamping load is what keeps the tank o-ring compressed and the filter sealed under running pressure. It also gets turned by hand every time the cartridge is cleaned.
Why it fails
Between the sun, the chlorine and the hand tightening season after season, the plastic goes brittle and the threads round off. Once the knob will not pull the head down properly the filter weeps at the band, and owners usually replace the tank o-ring first and are surprised when the leak stays. If the knob spins without drawing down, that is your answer. The tie rod itself is a separate part if that has also gone.
| Brand | Hayward |
|---|---|
| Manufacturer part number | CX250G |
| UPC | 610377004558 |
| Type | Pool Filter Part |
| Component | Filter lock knob |
| Fits | Hayward Star-Clear cartridge filters C-250, C-500, C-750, C-1000 |
| Shipping weight | 0.25 lb |
| Ships | Parcel |
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