Description
Product Overview
The CX900G Alloy Pool Filter Tank Locking Knob is a premium upgrade for Star Clear Plus pool and spa cartridge filter tanks. Machined from solid aluminum alloy with a knurled grip surface, this knob replaces the factory plastic locking knob that commonly cracks, strips, or becomes brittle from UV and chemical exposure. Designed for C900, C9002, C1200, C12002, C12002S, and C751 filter series.
Key Features
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CNC-Machined Aluminum Alloy: Precision-machined from corrosion-resistant aluminum — won't crack, strip, or degrade like the factory plastic knob.
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Knurled Grip Surface: Provides superior hand-tightening torque even with wet or gloved hands. No tools needed for filter element changes.
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UV & Chemical Resistant: Anodized finish resists pool chlorine, bromine, salt water, and prolonged sun exposure.
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Perfect Seal Pressure: Flat machined base distributes clamping force evenly across the tank lid O-ring — eliminates bypass leaks common with warped plastic knobs.
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Universal Thread Fit: Compatible with Star Clear Plus threaded tension rods on all model variants.
Compatibility
| Brand |
Model Series |
Compatible Models |
| Star Clear Plus |
Cartridge Filter Tank |
C900, C9002, C1200, C12002, C12002S, C751 |
Specifications
| Specification |
Value |
| Part Number |
CX900G / FJ-JP-X-CX900G |
| Material |
6061 Aluminum Alloy with Anodized Finish |
| Thread Type |
Acme/Buttress — Star Clear Plus Tension Rod |
| Diameter |
Approx. 75mm (3.0") |
| Finish |
Silver Anodized — Corrosion & UV Resistant |
| Installation |
Hand-tighten — No Tools Required |
Why Choose iFJF
Stop fighting with a cracked plastic filter knob every time you clean your cartridges. The CX900G alloy knob is a one-time upgrade that makes filter maintenance faster and leak-free for the life of your pool equipment. Backed by a 12-month warranty.
Frequently Asked Questions
Q: Will this knob fit my Star Clear Plus filter?
A: Yes. The CX900G locking knob is designed for Star Clear Plus cartridge filter and separation tanks including C900, C9002, C1200, C12002, C12002S, and C751 models. It's a direct replacement for the OEM plastic knob.
Q: Why upgrade from the plastic knob to this alloy knob?
A: The original plastic locking knob becomes brittle from UV exposure and chlorine, often cracking during filter changes. Our CNC-machined aluminum alloy knob is corrosion-resistant, UV-stable, and provides a much more secure seal — preventing tank O-ring leaks.
Q: Is installation difficult?
A: No. Simply unscrew the old plastic knob, place the new CX900G alloy knob onto the threaded rod, and hand-tighten. No tools required. Takes less than 30 seconds.
