Thermaltake's quick connect hoses rock pretty hard. They are designed so that both sides are closed and sealed except when mated together. Remember how I mentioned that the Symphony Mini came shipped to us pre-filled? The only thing between a liter or so of coolant and the FedEx box were these quick connect seals. The hoses were not connected during packaging or shipping. If Thermaltake puts this much faith in a quick connect seal, I think that speaks volumes of how good it is. - overclockercafe