What is it?\nThe Icicle PRO Hardtube fittings are a new development, based on our many years of experience in the field of water cooling. They represent the next evolutionary step of Alphacool Hardtube fittings. The development of these fittings was focused on solving a specific problem. At temperatures close to 60°C PETG hardtubes can deform. This especially affects the connections at the outlets of the CPU or graphics card water cooler.\nWith what kind of hardtubes can I use the Icicle PRO Hardtube Fitting?\nThe Icicle PRO Hardtube Fitting fits all hardtubes in the correct format. For PETG, acrylic, brass and also glass tubes this fitting can be used.\nWhat is the tensile strength of the fittings?\nCompared to other fittings the tensile strength is very high. In our tests, up to 8kg and more were not a problem. This means that you hardly have to worry about the slipping of a hardtube even with greater loads.\nWhat distinguishes the new fittings from others?\nOn the one hand, the new fittings come with an inlay made of nylon, which stabilizes the hardtube and prevents it from deforming at high temperatures, which can lead to a leakage of the system. Furthermore, the fitting has an O-ring and a crush seal. Compared to a normal O-ring, the crush seal has a significantly larger contact surface, which naturally leads to a better hold. Inlay and crush seal are arranged in the fitting so that they build up high pressure on the hardtube in the interaction of inside and outside.\nWhat do I have to pay attention to during assembly?\nBasically, the assembly of the Eiszapfen PRO Hardtube fittings is very similar to other fittings. New is the nylon inlay which is inserted into the end of the hardtube. First the union nut is pushed onto the hardtube and then the crimp seal. Then the nylon inlay is put on. Now the fitting is screwed on normally. To make this even easier, there is a hexagon socket recess in the hole of the lower part of the fitting.