ModsFinder

Redstone Underwater

by dcqout

Redstone Underwater lets redstone components work in water, with a gamerule that controls whether redstone placed underwater uses its own color.

FabricClient and serverMozilla Public License 2.0Open source1.21.11

What it does

Redstone dust, repeaters and comparators can be placed in water and keep working there. A game rule switches redstone that is waterlogged on or off, and another rule adds colored redstone so the underwater variant can look different from the vanilla red. Crafting redstone dust with glow ink sacs produces the underwater form, and the colors are still marked work in progress.

The mod requires Fabric API, and Waterlog is an optional companion that adds many water-friendly blocks, including buttons and levers. Redstone Underwater runs on Fabric for Minecraft 1.21.11 only, in both client and server environments, so the server and every player need it. The code is open source under the Mozilla Public License 2.0, and the latest Fabric file, 1.5.5 for 1.21.11, was published on 2026-02-09.

Key features

  1. Waterlogged redstone

    Redstone dust and redstone components keep functioning when placed in water, instead of breaking as in vanilla.

  2. Underwater game rules

    Game rules decide whether waterlogged redstone is enabled and whether colored redstone is used underwater.

  3. Glow ink crafting

    Underwater redstone dust is crafted from redstone with glow ink sacs, giving the variant a separate recipe.

  4. Work in progress colors

    The color options are described by the author as work in progress, so the palette may still change in later releases.

Compatibility

Latest build for each game version and loader.

1.21.111.5.5
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Requirements

Dependencies declared by the latest file for each loader.

Required 1

Fabric APILightweight and modular API providing common hooks and intercompatibility measures utilized by mods using the Fabric toolchain.
Required

Optional 1

WaterlogAllows more blocks to be waterlogged.
Optional

How it compares

Full comparison

Redstone Capacitor is open source under the MIT License and runs on Fabric for 1.21.1 – 1.21.4, so it covers older builds than Redstone Underwater. Expanded Redstone and Regius Redstone are both Fabric mods for 1.21.11 under All rights reserved and are not open source, so they do not offer the source code this mod publishes under the Mozilla Public License 2.0.

ModLoadersGame versionsEnvironmentUpdated
Redstone UnderwaterFabric1.21.11Client and server2026-02-09
Redstone CapacitorFabric1.21.1 – 1.21.4Client and server2025-10-19
Expanded RedstoneFabric1.21.11Client and server2026-07-23
Regius RedstoneFabric1.21.11Client and server2026-07-20

Questions

Does Redstone Underwater need Fabric API?

Yes. Fabric API is a required dependency, so it must be installed next to Redstone Underwater on Fabric for 1.21.11.

Does the server need Redstone Underwater?

Yes. A server running it needs every connecting player to have it too.

Is Waterlog needed to use Redstone Underwater?

No. Waterlog is an optional dependency that adds more water-friendly blocks such as buttons and levers, and the core features work without it.

In the catalog

Redstone Underwater is one of 8,499 Technology mods on ModsFinder, and one of 4,201 Technology mods for Fabric. 19,862 mods support Minecraft 1.21.11.

Technology mods8,499Fabric modsMods for 1.21.1119,862

More from dcqout

All projects
Inventory+1.20.1 – 1.21.11Fog Toggle1.21.11 – 26.2Waterlog1.21.11Oxygen+1.21.11Container Core1.21.11

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What the author says

Adds gamerule 'any_redstone_on_water': if false, to place redstone underwater craft a redstone dust with a glow ink sac. Adds gamerule 'colored_redstone': if true, redstone when placed underwater will have a different color.
dcqout, on the Modrinth page

Official listing

Owner
dcqout
Published
2026-02-07
Updated on Modrinth
2026-02-09
Facts verified
2026-10-15

Tags

Game mechanicsTechnology
Open on ModrinthCompare