There are several changes we can make to improve the efficiency of the pump, but a pump is only as efficient as its operation within a process. For us to improve its efficiency, firstly we need to understand its operation within your system, and then determine what changes may be required to optimise efficiency. If your pump was purchased prior to 2011, it will most likely have a low efficiency IE1 motor, which can be replaced with a higher efficiency version, however this efficiency gain can be insignificant if the pump is operating at the wrong area on the curve. It may be a good opportunity to reevaluate your process, which may have changed since the pump was originally supplied.