Please install according to the video
How to install Jansamn Keg Coupler
Choose JANSAMN Sankey D Tap
You need to choose keg taps that are made of high-quality materials and are actually reliable when pumping beer. The flow needs to be consistent, smooth, and fast.
Please note: Use this D coupler you also need a gas tank/Co2 regulator faucet/brewing hose to let the gas transfer from the regulator to the coupler and dispense your beer. Then tap the sankey coupler to the keg, then down the handle to lock the keg coupler, and pull the handle out to unlock sanke coupler.