For connection to gas cylinders, for regulating the pressure to the nominal pressure of the gas appliance. With PRV safety relief valve. Vent plug that simultaneously prevents moisture, e.g. rainwater, from penetrating the interior of the regulator. Version with combination connection for optional connection to 5, 11 or 33 kg gas cylinders. KLF x G 1/4 LH-KN, 50 mbar, 1.5 kg/h.