The Monsoon Range from Stuart Turner start with the 4.0 bar twin end shower pump. Flow switch operated and designed for positive head applications the pump will supply water at 4.0 bar at a constant flow of 9 litres per min x 2. Full mounting kit with flexible pipes. These pumps have similar performances to the flow switch operated twin pumps. However, unlike flow switch operated pumps, a negative head automatically supplying both hot and cold water under medium or high pressure to a shower or bathroom which, because of its position relative to the cold water storage system, does not benefit from gravity flow.