Koolance QD3 Quick Disconnect Coupling, 10mm Barb with G1/4 inch Male Thread to Quick Disconnect - Nickel

The Koolance QD3 Quick Disconnect Coupling with 10mm barb and G1/4" male thread brings a no-spill, high-flow solution to PC liquid cooling loops. Unlike standard fittings that require draining the entire system for component swaps, this nickel-plated brass coupling integrates an automatic shut-off valve on the male half, letting you disconnect tubing without a single drop escaping. The barb end fits soft tubing with a 10mm (3/8") inner diameter, while the G1/4" BSPP male thread screws directly into water blocks, radiators, pumps, or reservoirs. Pair it with any Koolance QD3 female coupling for a secure, tool-free connection that holds up to 10 kgf/cm² (142 psi) of pressure.

Highlights

• No-spill quick disconnect with integrated shut-off valve on the male side
• G1/4" BSPP male thread for direct component mounting
• Barb for 10mm (3/8") inner diameter soft tubing
• Nickel-plated brass construction with EPDM O-rings for long-term reliability
• High-flow design minimizes restriction in the loop
• Operates from -30°C to 100°C (-22°F to 212°F)

In daily use

This QD3 male coupling is the go-to choice for builders who frequently swap GPUs, CPUs, or radiators. The barb end grips 10mm ID tubing firmly, while the G1/4" thread ensures a leak-free seal on standard ports. The nickel plating resists corrosion and gives a clean, professional look. When you need to remove a component, simply pull the collar on the female side—the valve closes instantly, trapping coolant inside the hose. No mess, no air bubbles, no refilling. It's also ideal for external radiators or fill/drain ports where quick access is essential.

Full specifications

• Fitting type: Quick disconnect coupling, male half (plug)
• Connection 1 (component side): G1/4" BSPP male thread (parallel)
• Connection 2 (tubing side): Barb for 10mm (3/8") ID soft tubing
• Material: Brass, nickel plated
• Seal material: EPDM O-rings
• No-spill shut-off valve: Yes (integrated)
• Compatibility: Koolance QD3 female couplings
• Maximum pressure: 10 kgf/cm² (142 psi)
• Operating temperature: -30°C to 100°C (-22°F to 212°F)
• Application: PC liquid cooling systems

Final note

For a reliable, no-drip connection that keeps your loop serviceable, the Koolance QD3 male coupling is a proven performer. Its high-flow design and robust construction make it a staple in custom water-cooled builds.