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.

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Overview

The Thermaltake Pacific CL-W099-CA00BL-A is a G1/4" dual compression fitting engineered for 16mm outer diameter PETG hard tubing in custom PC liquid cooling systems. Built from brass with a black coating, the fitting is designed to deliver both structural reliability and a refined look inside a build. Its high-flow internal geometry keeps coolant moving freely, avoiding the pressure drops that can occur with more restrictive fitting designs.

Installation is straightforward: the PETG tube slides into the fitting body and the compression collar threads down to lock everything in place. Six pre-installed O-rings create layered sealing points that guard against leaks even under the pressure variations of a running loop. The standard G1/4" thread ensures this fitting connects directly to radiators, CPU blocks, GPU blocks, pumps, and reservoirs from Thermaltake and other manufacturers. For builders planning a hard-tube custom loop, the CL-W099 provides a dependable connection point that looks as good as it performs.

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

Frequently Asked Questions

This fitting is designed specifically for PETG hard tubing with a 16mm (5/8") outer diameter. It will not work with other tube sizes.
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.
It uses the G1/4" thread standard, which is the universal standard for PC liquid cooling components including radiators, pumps, and water blocks.
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.
Each tube run requires two fittings — one at each end. This product is a single fitting, so plan your loop accordingly.