Increasing pump suction pressure... What happens to the discharge pressure?

Simple pump question... If I have a pump with 1 bar suction pressure, and 2 bar discharge pressure, what is the discharge pressure if I increase the suction pressure by half a bar?

00:00 The centrifugal pump
00:50 The test setup
02:50 Right and wrong ways to start a pump
05:30 Increasing suction pressure
07:55 How to think about pump pressures

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