Power showers are designed for low pressure systems and are most suited in homes where water storage tanks have little or low water pressure. With a power shower installed, the system will be able to overcome the low water pressure and increase the flow rate.
There are three basic configurations, the first is with a built-in pump with the mixer fitted to the shower wall and fed with cold and hot water. The second configuration has an impeller pump between the shower head and mixer, and the third has a double impeller between the mixer and water supply.
Power showers don’t actually heat the water as their purpose is to move water using the pump and into the shower head. Because of the pump, pressure is increased and will pull more water out of the tanks faster than before. Compared to electric mains and gravity feed showers, power showers generate higher water flow. Because of this, your bathroom must have a deep shower tray and it may need to be changed regularly to ensure water flow is smooth.
Different types of power showers are available, but what they all share in common is the need for a tank fed with cold and hot water. In addition, power showers need an electrical feeder for the pump. A low volt pump usually requires a transformer, but it is often supplied with the unit.
Of all the configurations available today, the most versatile is the double impeller pump as it is capable of serving several showers. At the same time it can also supply cold and hot water for basins, bath etc. Usually the pump is fed cold and hot water off the tanks, increasing water flow to the shower, so with a well designed power shower you should get a device that provides consistent water flow.