Reservoir
Reservoir is a Forge block that stores water and releases it in a half sphere when a redstone signal arrives, aimed at survival terraforming.
What it does
A filled Reservoir holds water up to 8 times, and a higher stored level increases its effective release range. A redstone signal makes the block release its stored water into the area beneath it as a half sphere, filling suitable open spaces and stopping terrain from waterlogging where that is not wanted. Players can use it to shape lakes, rivers and other terraforming projects without collecting water by hand.
The block keeps its stored water when it is broken, so a filled Reservoir can be picked up, carried elsewhere and reused without refilling it first. The author describes it as a survival-friendly alternative to placing dozens or hundreds of water buckets by hand, one that still feels close to vanilla. The mod is published for Forge 1.20.1 and runs on client and server, so both the server and every player need it. It is released under the MIT License and is not open source.
Key features
Water storage
Each Reservoir holds water up to 8 times and can be picked up with its contents intact.
Redstone release
A redstone signal makes the block release its stored water into the area beneath it as a half sphere.
Range by level
A higher stored water level increases the effective release range, up to 8 blocks.
Reusable blocks
A broken Reservoir keeps its water, so it can be moved and used again without refilling.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Lakes and rivers
Filling a shaped area with a single release replaces many manual bucket placements on large projects.
Terraforming in survival
Players working in survival mode can move large amounts of water without carrying stacks of buckets.
Who it’s for: Builders, terraformers and survival players who want to create lakes, rivers or other water features without placing large numbers of buckets by hand.
Questions
Does Reservoir need Fabric API or another library?
Does Reservoir have to be installed on both sides?
Can a Reservoir be reused after it releases its water?
In the catalog
Reservoir is one of 8,499 Technology mods on ModsFinder, and one of 4,122 Technology mods for Forge. 34,764 mods support Minecraft 1.20.1.
More from LightDeficient
Similar mods
What the author says
This mod adds a practical new block designed to make large-scale water terraforming much easier in survival mode. The Reservoir can be filled with water up to 8 times, with each stored level increasing its effective range (up to 8 blocks). When activated by a redstone signal, it releases its stored water into the…
Official listing
- Modrinth page
- modrinth.com/mod/reservoir
- Owner
- LightDeficient
- Published
- 2026-08-02
- Updated on Modrinth
- 2026-08-02
- Facts verified
- 2026-10-15