A compact valve combination for applications with thermosyphon systems. The cold water side has the non return and shut-down components and connections for safety valve, vacuum valve etc. The hot water side is regulated within a temperature range of 35 to 60°C and offer also an in-line scald safe* function by the thermostatic mixing valves series VTA320. *)Scald safe means that in case of cold water failure, the hot water shuts off automatically.