After-Sales Service: CO2 regulator is a precision instruments. In the process of using, you need to make sure that the connections are precisely connected and the operation procedure is correct. If there is any leakage problem during the use ( No leakage under normal circumstances) , don't worry, you can contact us directly and we will provide technical support for you Easy to Adjust by Hand: CO2 gas Kegerator regulator has 2 control knobs entire brewing system pressure easily. The larger knob offers precise adjustments, while the smaller one is a ball valve, which allows immediate shut-off and no liquid will backup. Both function easily. Set the keg pressure to the desired value by slowly turning the large pressure adjustment knob in the “+” direction. Please remember to open the small pressure adjustment knob in advance before adjusting the pressure value setting Safety & No Leaks: Standard CGA-320 inlet compactly fits to any standard North American CO2 gas tanks with a male thread. FERRODAY CO2 keg pressure regulator is equipped with 1/4’’ & 5/16’’ Barb for connection to I.D 1/4" & I.D 5/16" gas hoses, and features a heavy-duty forged brass body, well-made connections, and an exquisitely crafted pressure relief valve that prevents leakage of any type of gas Pressure Release Valve & Filter: Safety first! A customized pressure release valve automatically releases pressures at about 50 psi for safety concerns. Also can be manually pulled out for pressure adjustment. A sintered metal filter in the stem keeps dirt out of the regulator. If the pressure value is exceeded it will leak, please note that this is normal. Normal use pressure values for the product are less than 50 psi Lock Ring to Hold PSI & Big Gauge Clear View: A lock ring under the big knob, so the knob can be firmly locked to hold your pressure setting. Two Big gauges always accurately show you the CO2 volume in the cylinder and the output pressure to keg. FERRODAY keg regulator has a clear view of pressure for a better homebrew experience FERRODAY dual gauge CO2 regulator is used for draft beer setups, fits all standard CO2 tanks with CGA-320 inlets. The CO2 Gas Cylinder Pressure Regulator features a heavy-duty forged brass body with well-made connections and an exquisitely crafted pressure relief valve to prevent any kind of gas leakage. This precision kegerator c02 regulator ensures users can accurately read and control the output pressure, guaranteeing a great beer-drinking experience and enhancing your home brewing journey! Enjoy the stable dispensing beer with FERRODAY dual gauge & dual stage co2 regulator for kegerator ! Cheers for your camping, family gathering, and any other parties!