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 aqua computer Dr. Drop testing device incl. Air pump you get a practical set, which means you can check a full circuit of a water cooled system before filling for any leaks.The aqua computer Drop pressure tester at a glance:- Set from Dr. Drop 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 the Dr. DropAfter completing a water cooling system the Dr. Drop tester can easily 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 first recommends 550 mbar, which should be regulated to 500 mbar by unscrewing the pump via a drain valve. 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. But should the pressure drop, 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-milled connection terminal made of sturdy Delrin, which comes from aqua computer and comes pre-assembled with the manometer. The tube of the air pump, however, consists 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: Delrin / metal- Measuring range: 0 - 0.6 bar- Connection thread: 1x G1 / 4 inchContents: - pressure tester - air pump - valve needle - bike mount