I am curious to know what happens to a fix speed centrifugal water pump's outlet head if the inlet head is already relatively high.

For example, say a pump is said to have a max head of 10m. If it is placed in a system such that it has a head of 15m on the inlet, what would the max head on the outlet be?

Is there a linear (or other) relationship between inlet and outlet pressure, if all other variables are kept constant? (I understand you need a certain inlet pressure to stop a pump from cavitation. I meaning once above that level.)



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