How to drain the hotel bathtub?

Every bathtub will have a water outlet from which water is discharged. Pay attention to the outlet of the bathtub, which is the black spot on the low plate. Below is the passage (drain pipe) connecting the sewer. There is a water seal above the water outlet. Take off the water seal and you can drain the water. How to install the bathtub drain? The bathtub drainer consists of downpipe, corrugated pipe, straight pipe, overflow elbow and trapezoidal rubber ring. The downpipe and the overflow elbow are communicated with the straight pipe through corrugated pipes. Just deal with the drain pipe and floor drain of the basin. A good method recommended on TV is to use plastic wrap, find a bottle cap or something like that, or cut a ring from a bottle of suitable size, just enough to cover the leaking drain pipe, wrap some plastic wrap around the ring, make the plastic wrap into a tube and fix one end. Then wrap the wrap around the drain with plastic wrap, which must be firm and cannot be washed down by water. Therefore, the size of the ring should be appropriate, and the pipes under the basin and kitchen sink are easier to handle. Pull up the hose leading to the drain pipe, wrap several layers of plastic wrap directly at the end of the pipe, and then plug it into the drain pipe. For the same reason.