Koelerhouder Alphacool ES D-Plug chroom messing 2 cm 35 g

The Alphacool ES D-Plug is a chrome brass connector with two G1/4" male threads designed to join water-cooling components such as GPU and CPU coolers or radiators in a cooling loop. The connector is available in multiple lengths (20 mm, 25.5 mm and 31.5 mm) and includes replacement O-rings in three colours. The ES D-Plug is built for durability and compact installation, with a diameter of 2 cm and a weight of 35 g.

Advantages

Unlike traditional double nipples or screw-type adapters, the ES D-Plug is a push-in connector that achieves sealing and stability via two closely fitting O-rings on the male portion. Tested in Alphacool’s lab, the connector maintains stability up to 1.5 bar. The D-Plug also offers a variable length feature that can be extended by up to 15 mm, allowing compensation for minor layout inaccuracies and preventing hose twisting during assembly.

Suitable for

• Connecting GPU and CPU water blocks
• Joining radiators or radiator sections in compact systems
• Space-restricted or tight routing of water-cooling loops
• Quick replacement or modular water-cooling setups

Key specifications

• Threads: 2 x G1/4" male
• Material: Chrome brass
• Available lengths: 20 mm, 25.5 mm, 31.5 mm
• Variable extension: up to 15 mm
• Diameter: 2 cm
• Weight: 35 g
• Tested stability: up to 1.5 bar
• Includes: replacement O-rings (three colours)

How to use

Insert the male end of the ES D-Plug into the corresponding G1/4" female thread until both O-rings are fully recessed in the female component to ensure proper sealing and stability. If additional clearance is required, extend the connector by pulling the male and female parts apart to achieve up to 15 mm of added length. Follow normal assembly practice for water-cooling systems and verify that connections are fully seated before filling the loop.

Recommendations

Ensure both O-rings on the male component are completely seated inside the female thread to guarantee tightness and stability. Use the included replacement O-rings if original seals show wear or if a different colour is needed for identification during system assembly.