CurseForge · Minecraft mod
Mechanical Pump
A simple mechanical fluid pump
Quick answer
Which Mechanical Pump release should I use?
Mechanical Pump aos_basic_fluid-1.21.1-1.0.5.jar targets 1.21.1 with NeoForge. The project page does not say whether this file belongs on the client, dedicated server, or both. All 2 required mods have matching files.
Where it goes
Is Mechanical Pump required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does Mechanical Pump aos_basic_fluid-1.21.1-1.0.5.jar need?
aos_basic_fluid-1.21.1-1.0.5.jar. Change the file and its required mods may change too.
Install Age of Steam Core, ARLib first. We found matching files for this game-version and loader setup. 3 come through another mod in the chain.
3 extra mods were pulled in by other dependencies. Indented rows show who needs each one. We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add Mechanical Pump without breaking your instance.
Built for Mechanical Pump aos_basic_fluid-1.21.1-1.0.5.jar. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use aos_basic_fluid-1.21.1-1.0.5.jar. It targets 1.21.1 with NeoForge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install Age of Steam Core, ARLib first. We found matching files for this game-version and loader setup. 3 come through another mod in the chain.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside aos_basic_fluid-1.21.1-1.0.5.jar. It opens that exact file at the source.
About this project
What does Mechanical Pump add?
This mod adds a mechanical pump. The pump does consume fluids, but you need a finite water mod to empty a water area.
The pump always prioritizes source blocks at the highest connected y level that are the most far away from the pump to be pumped first.
You can change some properties in config. By default, the pump works in a radius of 96 blocks (6chunks) (~30k blocks) around the pump, scanning 1000 blocks per tick. So its highest speed on large oceans is 1 block / 1.5 seconds, no matter how much energy you put in.
A scanning speed of 1000/tick should not have any performance impacts. The code uses a TreeSet to sort the blocks by distance . Maybe I will optimize this in the future...
The pump processes 1 block every rotation.
Recommendations for use:
I strongly recommend you install my finite water mod for improved performance when pumping water from large areas of water. Even if you want infinite water everywhere you can just set the blacklist empty.
lets look at the following example:
By default, the pump will try to pump the highest water source it can find. This would remove the water channel and break the build. With my finite water mod, the pump will notice it sits in a river biome where water is infinite. So it will try to pump the first water source it can find and leave the water channel.
Note that the pump will always prioritize water above, so in the example shown you would need to have a water source directly below the pump or it would scan the channel up. Once the pump detects any water block at a higher y level from where it currently scans, it will completly disregard the current scan and only scan the higher y level for water sources.
Project description from CurseForge.
Pick your setup
Mechanical Pump by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.1
1 loader build1.21
1 loader buildCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Mechanical Pump versions and loaders
aos_basic_fluid-1.21.1-1.0.5.jar
30 Mar 2026
aos_basic_fluid-1.21.1-1.0.4.jar
3 Mar 2026
aos_basic_fluid-1.21.1-1.0.3.jar
4 Nov 2025
aos_basic_fluid-1.21.1-1.0.2.jar
27 Feb 2025
aos_basic_fluid-1.21.1-1.0.1.jar
16 Feb 2025
aos_basic_fluid-1.21.1-1.0.0.jar
15 Feb 2025
Looking for an older file? The official CurseForge project page is in Resources.