Confirm the water faucet
It is required that the front end shall be longer than 10mm.
The exit end face of the faucet shall be flat and smooth.If not please file it to avoid leakage.
water faucet, not suitable
The exit end face of the faucet 
Connection between the water inlet hose jointer and the water faucet
1.Press the lower end of the lock lever and push down the slider. Take off the water inlet hose jointer from the water inlet hose component. See to Figure 1.
water inlet hose jointer
Slider
Lock lever
water inlet hose
Figure 1
2.Loosen the screw till the water faucet can be accessed. Put the jointer of the water inlet hose on the faucet. See to Figure 2. (If the faucet is too large and the jointer can not be set on the water faucet,please loosen the four screws and take out the bushing in the jointer. The front end of the faucet must be smooth, otherwise it may leak water. See to Figure 3.)
3.Fasten the four screws evenly. See to Figure 4.
Screw
Sign plate
Bushing
Screw knife
Figure 2 | Figure 3 |
4.Take off the nameplate. Twist the fastening nut as per the indication of the figure to seal up the exit end face of the faucet. See to Figure 5. 
Remark: Before installation, the threading is 
4mm above the upper surface of the nut.After installation, the threading is 2mm above the upper surface of the nut.See to Figure 6.
Figure 4
Screw nut
About 4mm before twisting About less than 2mm after twisting
Figure 5 | Figure 6 |
6