Where does HomeBoost get the additional water to increase the flow?

HomeBoost draws water from the mains water supply pipe to deliver an increase of flow into the property. If HomeBoost recognises poor flow (between 3L/min and 12L/min) it will activate the motor and increase the flowrate up to 12 L/min (the maximum allowed pumped flow directly on the mains). Where the flow turbine recognises more than 12 L/min, the signal is sent to the pump to sit in idle mode.