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Alphacool has had a major renovation in the last few months with their branding and product lineup, and especially with emphasis on their “Eis” series of products. There are now over 10 different categories of products that begin with “Eis” and this is part of their strategy to elevate the brand above the public perception as a budget brand with QC issues. I do applaud them for the thought, and these fittings here are part of a collection of items I received to make my own conclusions accordingly. This article follows up where the one describing the Koolance QD3 and QD4 fittings left off, with more coverage on the Eiszapfen (Icicle) quick disconnect fittings. Thanks a lot to Aquatuning for arranging these samples for testing.

One difference here, compared to the other QDCs I have here, is that these new fittings are only available in 1 SKU each per color finish. That does make my job a lot easier, although as a customer and fellow enthusiast I am not sure yet how I feel about it. The Alphacool Esizapfen QDCs come in a chrome finish or matte black finish, with specs shared between them:

Technical Details:

  • Dimensions (L x D): 64,6 x 23,9mm
  • Material: Brass
  • Colour: Chrome
  • Thread: 2x 1/4″ internal thread
1. Side: G1/4″ inner thread
2. Side: G1/4″ inner thread
Color: silver nickel/matte black
Compatibility: Soft tubing (PVC, Silikon, Neoprene)
Manufacturer: Alphacool
Material: Brass
Rotatable: No
Thread length: 5mm

Scope of Delivery:

  • 1x Alphacool Eiszapfen quick release connector kit G1/4 inner thread – Chrome
  • Note: The quick couplings should not be used permanently in dry condition, since the O-rings may be too much strain and tightness is no longer guaranteed.

There is also a YouTube video with an overview of these fittings, if you are interested. These are zero-drip type fittings in that you won’t have coolant dripping out when you disconnect the fittings. At most, some residual droplets may be seen on the mating surfaces. Alphacool is interchangeably using chrome and silver nickel here, but the point remains that this resembles other nickel plated brass fittings from several manufacturers including Alphacool in finish and exterior appearance more so than the Koolance fittings- more on this later. As mentioned previously, these also come in a single option at the moment in terms of what is on the other side of the mating sections of the male insert piece and female body piece. Both have a female threaded G1/4″ port, and this is an interesting choice. On one hand, a threaded port following the de facto BSP G1/4″ standard allows for compatibility with everything else but at the same time it necessitates the use of a male-male G1/4″ threaded adapter to use with loop components that have a female threaded port to begin with. As such, these would only be handy when used in between sections of soft tubing with barbs/compression fittings on either end. I would have preferred to see one piece have a male threaded section so that these QDCs end up as a male-female type extender in action and also allowing the usage directly on components that end up being removed more often than not including GPUs with a water block on them. Alphacool is looking into making more options depending on the public interest, so please let them know what you wish to see in the comments section below or via social media directly to them.

Aside from this, I would have liked to see a technical drawing with various dimensions listed out for the QDC kit but in person it is fairly easy to tell that these are very similar to the Koolance QD3 fittings, and are generally compatible with most blocks that have threaded ports reasonably away from each other. A good rule of thumb here is- if you can fit average sized 1/2″ x 3/4″ compression fittings then you can probably fit these too. It would have been nice to have a P-Q curve also to give customers an idea of flow restriction, but the general audience does not expect it from manufacturers I have come to see. A standard 1 year manufacturer warranty applies here, and I have no issues here given that any problems with fittings are going to be found within a couple of months of usage. Let’s now take a good look at these on the next page.

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