In the Osmolator and Osmomat, the enclosed low-voltage centrifugal pump can be replaced by this switched socket outlet in combination with a more powerful pump. The switched socket outlet can be used to switch metering pumps with 230 V (115 V), max. 1,800 W (900 W), such as Turbelle® 800/2, 1200/2, Master 1073.03 or a hose metering pump.