Which system yields a higher head when adding another identical pump?

Adding another identical pump in a series system will indeed yield a higher head. In a series configuration, the pumps are arranged to increase the total head by adding the head produced by each pump. This means that if one pump raises the water to a certain height, adding another identical pump will raise it even higher, effectively summing the head produced by each pump.

For example, if each pump contributes a head of 50 feet, two pumps in series would provide a combined head of 100 feet. This is a fundamental principle in pump systems: the head increases with additional pumps in series, whereas in parallel configurations, the flow rate increases while the head remains the same as that of a single pump. Thus, for achieving greater head, a series arrangement is the appropriate choice.