The Wilo Stratos-Z 50/1-9 (2090474) is a single phase glandless premium high-efficiency pump with a 0.4kW motor. The Wilo Stratos-Z range are domestic water circulation pumps for use in heating and air conditioning systems, with a choice of either screwed or flanged connections. A built-in flow limiter, as well as the inverter control system, keep energy use to a minimum. These pumps feature a red brass housing which is highly resistant to corrosion - particularly useful in systems that are prone to allowing oxygen to enter.