Alphacool 15178 computer cooling system part, translucent, 1/4" thread, 17 mm height, 12 mm diameter

Alphacool 15178 is a compact accessory for PC liquid-cooling systems, featuring a translucent finish and a G1/4 (1/4") threaded connection. With a height of 17 mm and a diameter of 12 mm, this low-profile component is intended for integration into tubing, fittings, expansion tanks and other tight assemblies where a threaded, sealed element is required. The part includes an O-ring seal for secure installation and a 5 mm hole designed to accommodate LEDs for visual lighting options in custom water-cooling loops.

Advantages

The translucent body provides visual access while maintaining a compact footprint suitable for confined spaces. The standardized G1/4 thread ensures compatibility with common fittings and expansion tanks, and the included O-ring seal supports reliable, leak-resistant installation. A dedicated 5 mm hole for LEDs enables simple lighting integration without modifying the component, making it suitable for modding and aesthetic customization.

Suitable for

• Custom PC water-cooling loops and tubing assemblies
• Integration into expansion tanks and reservoir tops with G1/4 ports
• Compact builds and casemods requiring low-profile threaded inserts
• LED lighting installations within cooling system components

Key specifications

• Finish: translucent
• Thread: G1/4 (1/4")
• Height: 17 mm
• Diameter: 12 mm
• Seal: O-ring included for leak resistance
• LED accommodation: 5 mm hole for LED placement

How to use

Thread the Alphacool 15178 into a compatible G1/4 port on an expansion tank, reservoir top or fitting. Ensure the O-ring is seated correctly to create a secure seal, then tighten until hand-tight plus a small additional turn as needed to prevent leaks; avoid over-tightening. If using LED illumination, insert a 5 mm LED into the provided hole and route wiring according to your build's cable management practice, ensuring insulation and strain relief are in place.

Usage recommendations

Use compatible G1/4 threaded ports and check O-ring condition during installation. Apply minimal appropriate thread sealing if recommended by the reservoir or fitting manufacturer; avoid excessive torque to protect threads and the component. For lighting, use low-voltage LEDs and ensure wiring does not interfere with coolant flow or create stress on the seal.