CurseForge · Minecraft mod
Flopper
A hopper for transferring fluids
Quick answer
Which Flopper release should I use?
flopper-26.1.2-fabric-1.1.9.jar targets 26.1.2 with Fabric, Quilt. The project page does not say whether this file belongs on the client, dedicated server, or both. All 1 required mods have matching files.
Where it goes
Is Flopper 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 flopper-26.1.2-fabric-1.1.9.jar need?
flopper-26.1.2-fabric-1.1.9.jar. Change the file and its required mods may change too.
Install Cyclops Core first. We found matching files for this game-version and loader setup.
We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add Flopper without breaking your instance.
Built for flopper-26.1.2-fabric-1.1.9.jar. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use flopper-26.1.2-fabric-1.1.9.jar. It targets 26.1.2 with Fabric, Quilt; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install Cyclops Core first. We found matching files for this game-version and loader setup.
- 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 flopper-26.1.2-fabric-1.1.9.jar. It opens that exact file at the source.
About this project
What does Flopper add?
This mod requires the Cyclops Core library!
Come talk to us in #flopper on the Cyclops Discord server!
We've had to suffer long enough in our early-game fluid transfer endeavours...
Here's the Flopper, a Fluid Hopper!
The Flopper is an early-game block to move around fluids, just like the Hopper does for items.
It is able to take in fluids from the top (either from a tank, or from the world), and push it to the target side (either to a tank, or to the world).

Tanks will always have a preference over world-interaction.
Note: Tanks are not included in this mod, those are Dark Tanks from EvilCraft.
A simple, early-game recipe.

This block has no GUI, because who needs GUIs anyways? Instead, you can right click on the block to display contents. The contained fluid will also be rendered dynamically (can be disabled).
You can also right-click to insert fluids from any fluid tank item, or extract by shift+right-clicking.

And yes, the Flopper has proper bounding boxes that allow you to click on blocks behind it.

Just like the regular Hopper, you can disable it using a redstone signal.

Everything ranging from the input fluid rate to the cooldown duration for world-interaction can be configured in this mod! Here's an excerpt from the config file:
machine {
# The maximum capacity in mB.
I:flopper.capacityMb=5000
# If the collision boxes should be made smaller to allow clicking behind the flopper.
B:flopper.narrowCollision=true
# The rate at which fluids can be pulled from other tanks.
I:flopper.pullFluidRate=100
# If fluids should be pulled from the world.
B:flopper.pullFluidsWorld=true
# The rate at which fluids can be pushed to other tanks.
I:flopper.pushFluidRate=100
# If fluids should be pushed into the world.
B:flopper.pushFluidsWorld=true
# If the contained fluid should be rendered.
B:flopper.renderFluid=true
# The number of ticks each flopper should sleep after interacting with tanks
I:flopper.workCooldown=8
# The number of ticks each flopper should sleep after picking up or placing fluids.
I:flopper.workWorldCooldown=20
# If neighbour-change events should be triggered when placing or picking up fluids to/from the world.
B:flopper.worldPullPushNeighbourEvents=true
# If sounds should be placed when placing or picking up fluids to/from the world.
B:flopper.worldPullPushSounds=true
}
This mod was inspired by the pre-1.12 Funnels mod.
This mod collects anonymized startup data, this can be disabled in the config file and adheres to Minecraft's snooper settings.
Support us via the referral code cyclops when renting a server at Bisect Hosting, and get 25% off your first month!

If you like this mod, consider supporting me on Patreon!
Project description from CurseForge.
Pick your setup
Flopper by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.2
4 loader builds26.1.2
4 loader builds26.1.1
4 loader builds1.21.11
4 loader builds1.21.1
4 loader buildsCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Flopper versions and loaders
flopper-26.1.2-neoforge-1.1.9-237.jar
20 Jul 2026
flopper-26.1.2-fabric-1.1.9-237.jar
20 Jul 2026
flopper-26.1.2-forge-1.1.9-237.jar
20 Jul 2026
flopper-26.2-neoforge-1.1.9-238.jar
20 Jul 2026
flopper-26.2-forge-1.1.9-238.jar
20 Jul 2026
flopper-26.2-fabric-1.1.9-238.jar
20 Jul 2026
flopper-1.21.1-neoforge-1.1.8-236.jar
20 Jul 2026
flopper-1.21.1-fabric-1.1.8-236.jar
20 Jul 2026
flopper-1.21.1-forge-1.1.8-236.jar
20 Jul 2026
flopper-26.2-neoforge-1.1.9-234.jar
13 Jul 2026
flopper-26.2-forge-1.1.9-234.jar
13 Jul 2026
flopper-26.2-fabric-1.1.9-234.jar
13 Jul 2026
Looking for an older file? The official CurseForge project page is in Resources.