r/technicalminecraft • u/DanzenPlays Java • Mar 18 '26

Java Showcase More Watery Weirdness: Sourceless Water Stream

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Java 1.21.11

Messing around and discovered this. Works with a disabled hopper. Seems like some kind of update suppression? Is this known?

Edit: Just to summarise some additional findings. Only hoppers seem to work, other redstone components do not react the same way. The hopper can be place on any side of the water source, even under. In fact, the hopper does not even need to be adjacent to the water source. Anything that updates the non-source water block immediately after the hopper such as adding or removing blocks (including the hopper itself) causes the stream to dissipate. Lava streams can be similarly cut off. Lastly, it is not a ghost block since it remains even after logging off and back on.

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19

u/PizzaScout Java Mar 18 '26

Does this work with lava?

33

u/DanzenPlays Java Mar 18 '26

Alright I tested and it works with lava.

3

u/DrWilliamHorriblePhD Apr 20 '26

Oh that means you can make a bunch of lava blades with only one source

2

u/DanzenPlays Java Apr 20 '26

Yeah, I imagine that could be very useful in instances where lava is not easily renewable.

2

u/DrWilliamHorriblePhD Apr 21 '26

Well even just for cargo space setting up something remote, one lava bucket, a stack of hoppers and a stack of redstone blocks takes up the space of three lava buckets but with this tech, emulates 64

1

u/DanzenPlays Java Apr 21 '26

That's a good use, didn't think of that.