Occasionally we have a client managing a site with a fixed speed cold water booster set where they're experiencing fluctuating water pressures. It can be a frustrating issue to deal with, as inevitably when an engineer goes to investigate it seems to be working fine. ​It's not only service problems it causes, either. Additional load on the pipework and on the pumps can reduce the lifespan of the system, and it will be energy inefficient too. So you can add high additional