Elaborate water-cooled systems not only devour a lot of time during assembly, they are not cheap in most cases. Therefore, you should think of all necessary components and check the circuit for leaks before filling. With the Dr. Drop PROFESSIONAL test instrument incl. Air pump this practical set allows the circuit of a water cooling system to be checked for just such leaks before it is filled.The aqua computer Drop PROFESSIONAL pressure tester at a glance:- Set from Dr. med. Drop PROFESSIONAL Pressure Tester, Air Pump & Accessories- Pressure tester measures between 0 - 0.6 bar & is fully assembled- A G1 / 4-inch female thread for connection to the water cooling- With the air pump, a test pressure can be generatedFunction and purpose of Dr. Drop PROFESSIONALMany will now wonder how such a check for leaks with Dr. Ing. Drop PROFESSIONAL looks like. The answer to that is amazingly simple. After completing a water cooling system, Dr. Drop PROFESSIONAL tester to be connected to the circuit. This is done via the existing G1 / 4-inch internal thread, which can be mounted with the appropriate connections eg on an adapter, hose or reservoir. Then the system can be pressurized with the supplied pump. aqua computer recommends first 550 mbar, which should be regulated after unscrewing the pump via a drain valve to 500 mbar. After setting the test pressure, you can leave the system for about 15 - 30 minutes. If no pressure drop is observed, the circuit keeps tight. However, should the pressure fall, you can, for example, go with a few drops of benzene or similar fast evaporating liquids on leak detection. Incidentally, the pressure tester consists of a high-quality pressure gauge from Wika, which is the world leader in the production of mechanical pressure gauges. It is complemented by a CNC machined aluminum connection terminal, which comes from aqua computer and comes pre-assembled with the manometer. The tube of the air pump is made of black anodized aluminum. In addition, it fits car valves, French valves and enclosed valve needle on ball valves. A practical bike holder is also included, this has the hole size for bottle holder and can be easily mounted. Technical details:- Material: aluminum- Measuring range: 0 - 0.6 bar- Connection thread: 1x G1 / 4 inchContents: - Pressure tester - Air pump - Valve needle - Bike mount