Parallel Operation


The two pumps are discharging to a common header.

It is important that the impeller speed, and outside diameters be the same, or the larger pump will throttle the smaller pump causing it to operate off of its best efficiency point (BEP)

In this illustration you can see the affect on the pump curve when two pumps are connected in parallel.

You can also see the affect if the same pumps are connected in series.


  • On February 16, 2018