Dr. Drop is an ingeniously simple pressure tester for your entire water cooling loop or for single components. 
With an air pump for car tire valves (not included in delivery), a test pressure can be applied. A large manometer with a diameter of 63 mm allows for precise pressure readings. A second valve is included to discharge the pressure after testing.
The pressure tester has a G1/4 inner thread to be equipped with a hose fitting compatible to your preferred hose diameter. 

Technical details:

• Base part material: Delrin, black
• Measuring range: 0 - 0.6 bar (approx. 0 - 8.7 PSI)
• Connection thread: G1/4