

How to build a down elevator
Here we will build a down elevator in Java edition 1.21.5.
This build will enable you to send items down. This can be useful if you are mining and wish to send items down into the mine.
This works by placing a magma block at the bottom of a water column the magma block will pull the items down and then they can be placed into a chest.
Repeater
Comparator
Dropper
Glass block
In this section we will discuss the materials and the ingredients that we need to make this build. This will give a concise list of the items and the recipe's to make them.
Bucket
Hopper
Chest
Hopper - to make a hopper you will first have to create a chest.
Repeater and comparator - you will need to make redstone torches first.
Here we will explain in detail how to build an elevator to move items down in Minecraft. Please follow the instructions carefully.


Lets begin by placing a chest with a hopper on top.
Build the glass compound around the hopper so that the glass is 1 block higher.
Next bring the glass out from the hopper so that water can flow down the middle and not overflow (normally 7 blocks).


Lets now place a magma block at the end of the glass runway. This will pull the items down.


Lets now place glass blocks around and on the same level as the magma block.
We now place a second level of glass blocks so that they are a block higher than the magma.
Place a water bucket on the back wall over the magma block.




Place glass blocks in a 3 x 3 block square with the water block that we placed before in the middle.
Place a water bucket at the back of the square.
Continue with this until you get the required height.


Build a platform out from the water block by 5 blocks long x 3 blocks wide.
Place 6 blocks on top of it in the formation shown in the screenshot.


Lets first place a dropper that points towards the the water.
Attach a hopper that leads into the dropper.
Place a comparator facing towards the dropper.
Place a block behind this with redstone dust on top.
Place redstone dust behind this.
Next to the last redstone dust we placed place a block.
In front of this place redstone repeater.
Finally place redstone dust in front of this.


Place a chest on top of the hopper.
Place a block behind the dropper on top of the comparator.
Place a block behind this leaving a one block gap.
What can go wrong - items shooting out of the structure.
The dropper can shoot items out of the structure. If this happens place another glass block opposite the dropper.
What can go wrong - water not reaching the hopper.
Move the hopper closer to the water source block.
Additional builds -
Transport - you can add minecart system to this build so that the items can be transported further.
Sorter - a sorter can be added so that items can be sorted.
Other suggestions -
You can pair this with an up elevator so that you can send items both up and down.