The Watermill AP283W 1.5 Bar Shower Pump is WRAS certified and designed to increase water pressure for showers and sink faucets, providing an intensified flow. It can achieve pressures up to 1.5 bar and features a positive head design. This means the water supply to the pump comes from a reservoir located at least 1 metre above the pump, utilizing gravity for a more efficient, unassisted flow. This design also reduces the risk of air accumulation in the system, which can harm the pump. This centrifugal shower pump from Watermill is ideal for replacing an older or broken model and can power a single shower.