Is there a product that connects the sink to the toilet?

If you look at the sewer pipe of the sink, you can see that it is an S-shaped pipe.

Usually there is a small amount of water in the tube, when there is water flowing down, the water level on one side of the S-shaped pipe rises, by the principle of the communicator, the water level on the other side should also rise, but due to the shape limitation of the S-shaped pipe, there is a gap in the water pressure on both sides, so that the water flows down.

When the water gradually runs out, the pressure on both sides gradually equalizes, and a small amount of water remains in the S-shaped tube according to the principle of the communicator.

Do you understand?

The water from the sink can flow down directly to flush the toilet, so that the water can be used more often, which plays a role in saving water and environmental protection. Of course, in addition to the environmental significance, the design itself is also very cute.

I think you might want something like this, and I'll do the same, if you find the right one, and breathe with each other.