Thermaltake
Thermaltake Pacific CL-W099-CA00BL-A PETG 16mm Compression Fitting
★★★★★
Thermaltake's CL-W099 PETG compression fitting delivers leak-free, high-flow connections for 16mm custom liquid cooling loops.
$17.99*
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.
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Overview
Key Features
High Flow Leak Free Design: The fittings allow proper connection to G1/4 ports, securing properly to cooling components while providing an even seal around the tubing
Black Coating Brass Fitting
G 1/4" Port
For PETG Tubes: Outer Diameter 5/8" (16mm)
6 Pre-installed O-Ring: Prevent coolant from leaking
Specifications
Type
Dual Compression Fitting
Material
Brass with Black Coating
Thread
G 1/4"
Tube Compatibility
PETG, 16mm (5/8") Outer Diameter
Design
High Flow, Leak Free
O-Rings
6 Pre-installed
Pros & Cons
👍 Pros
- Six pre-installed O-rings provide excellent seal redundancy without needing additional parts.
- High-flow internal design minimizes coolant restriction through the fitting.
- Brass construction offers strong durability and resistance to corrosion from common PC coolants.
- Standard G1/4" threading ensures compatibility with virtually all PC liquid cooling components.
- Black finish blends cleanly with most custom loop color schemes.
👎 Cons
- Only compatible with 16mm outer diameter PETG tubing, so switching tube sizes requires new fittings.
- Sold individually, which increases cost when outfitting an entire loop that may need eight or more fittings.
- Black coating can show scratches if overtightened or handled roughly during installation.
- Does not include a tube insert or alignment guide for easier PETG tube seating.
Frequently Asked Questions
What tube size does the CL-W099 fitting accept?
This fitting is designed specifically for PETG hard tubing with a 16mm (5/8") outer diameter. It will not work with other tube sizes.
How does the dual compression design prevent leaks?
The fitting uses two compression rings combined with six pre-installed O-rings to create multiple seal points around the tube, virtually eliminating the chance of coolant leakage.
What thread standard does this fitting use?
It uses the G1/4" thread standard, which is the universal standard for PC liquid cooling components including radiators, pumps, and water blocks.
Is the black coating on this fitting durable?
The fitting is constructed from brass with a black surface coating. Under normal installation and operation the finish holds up well, though overtightening with metal tools can scratch it.
How many fittings do I need per tube run?
Each tube run requires two fittings — one at each end. This product is a single fitting, so plan your loop accordingly.
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