Some similar Minecraft servers to Water Delivery include:

1. AquaCraft: This server focuses on water-themed gameplay, with underwater cities, marine life, and aquatic challenges to overcome. Players can embark on underwater quests, build their own underwater bases, and explore the depths of the ocean in search of treasure.

2. HydroWorld: HydroWorld takes the concept of water delivery to the next level, with players tasked with managing and maintaining a complex network of water sources, pipelines, and delivery systems. Players must work together to ensure that all areas of the server have access to clean water, facing challenges such as droughts, leaks, and water pollution.

3. Aqua Adventures: This server combines the survival and RPG elements of Water Delivery with a focus on exploration and adventure. Players can embark on quests, battle sea monsters, and discover hidden underwater caves filled with treasure. With a variety of custom plugins and unique gameplay features, Aqua Adventures offers a truly immersive experience for players.

4. OceanCraft: OceanCraft is a survival server set entirely on a vast ocean, with players tasked with exploring, building, and surviving on floating islands and ships. Players can trade with other players, form alliances, and compete in challenges to become the ultimate ocean explorer.

5. H2Oopia: H2Oopia is a water-themed server that offers a mix of survival, creative, and mini-games for players to enjoy. With custom water-themed biomes, challenges, and events, H2Oopia provides a unique and engaging gameplay experience for players of all ages.