This guide will let you know how to make a Working Sink in the Minecraft game.
In order to make a Working Sink, first you have to add a tripwire hook and spruce button on the wall in the same way as shown in the image below.
After this, place dark oak trap doors on the ground as shown below.
Then remove the ground lock under the tripwire hook and place a dispenser in it. Add a bucket of water in the dispenser.
The next thing you need to do is to remove the ground block from the back side of the dispenser and place a smooth quartz block on the ground. Use red stone dust on this block and dug ground.
The sink is functional now. Press the spruce button to fill it with water.