according to DVGW VP 638, for water up to 30 °C, plastic casing PN 16, flanged between connection piece, servomotor to shut off the water flow when the following criteria are exceeded: Total water volume, max. water flow, duration of withdrawal and vacation mode, electronic control with clear LED display, open/close button, display of reason for shutdown, standby function and plug-in power supply 230 V/50 Hz, with intermediate flange