Soda Hose CO2 Cylinder Refill Adapter W21.8-14 to TR21-4 Connector Fit for Soda Club Item Type: Soda Hose Material: Stainless Steel + Aluminum Alloy Color: Black+Silver Length: Approx.91.4cm/36in Weight: Approx.422g/14.9oz Test Pressure (TP): 17000psi Working Pressure (WP): 6000psi Interface Diameter: 21.8mm/0.86in Thread Interface: W21.8-14 // TR21-4 Applicable Countries: South Korea, Japan, Britain, Germany, France, Poland, Norway, Switzerland, Russia, Ukraine, South Africa, Sweden, Chile, Czech Republic, Singapore... (some countries are also called DIN477 /JIS m22-14) How e: 1. Screw the pin valve into the Soda machine 2. Screw the nut onto the carbon dioxide cylinder and tighten it with a wrench 3. Connect the quick connector 4. Open the valve of the gas cylinder 5. After completion, you can use the Soda machine. If you want to unscrew items from the machine: 1. Close the atmospheric cylinder valve 2. Press the button of the Soda machine to discharge the remaining carbon dioxide (if you do not disconnect the connector according to this guide, the o-ring of the quick connector will blow off) 3. Disconnect the quick connector 4. Unscrew the pin valve on the Soda machine and unscrew the nut on the CO2 cylinder