Water Air Lock Inspired by TheBestCubeHD Schematic brings a working 3×3 door to your underwater bases. This redstone build gives you a safe way to enter and exit bases without flooding them. It uses exactly 396 blocks and fits into a small space measuring 7 by 13 by 21 blocks. You can paste this litematic file right into your vanilla game.

Water Air Lock Inspired by TheBestCubeHD Schematic Thumbnail

3D Preview:

Features:

  • 3×3 Door Size: Gives you plenty of room to walk through the airlock.
  • Vanilla Redstone: Works in the normal game without needing any extra mods.
  • Keeps water out of your base while you walk inside.
  • Takes up a small footprint of just 7 by 13 by 21 blocks.
  • Requires exactly 396 blocks to build the entire system.

Schematic Specs:

Minecraft1.21.x
Dimensions7×13×21
Total Blocks396
Top Blocks Used
Redstone Wire 67White Wool 55Water 39Observer 37Sticky Piston 22

Screenshots:

Interior view of a water air lock with copper trapdoors and stone bricks
Interior view of a water air lock with copper trapdoors and stone bricks
Inside a redstone air lock room featuring copper trapdoors and stone walls
Inside a redstone air lock room featuring copper trapdoors and stone walls

Water Air Lock Inspired by TheBestCubeHD Schematic Download Links

For Minecraft 1.21.x

Vanilla 29 KB May 30, 2026
Download from Server 1 — Download from Server 2

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