The total static head is often only considered when selecting a pump. However, because of frictional losses, this method can often lead to large error, and in many cases, the pump performance will not meet expectations. The selection process becomes even more complicated when a nozzle or sprinklers are used.

In order to accurately predict the performance of a centrifugal pump in a specific application, the total head losses must be considered. These losses include, but are not limited to: total static head, losses due to pipe size, length, and material, and losses due to sprinklers or a nozzle.

Accurately predicting the discharge and pressure for a given pump in a specific application requires tedious calculations and a lot of trial and error.

Honda offers Pump Select® software to make the difficult calculations for you.