Describe the bug
You can make a water source block using a sluice and a wooden bucket.

To Reproduce
Place a sluice with a block at the high end and an open space at the low end
With a wooden bucket place water at the high end
There is a chance doing this that the sluice will create a source block of fresh water
It is easier to do with two wooden buckets
same as above except after you place water with the first bucket switch to the other bucket and place water again.
https://www.youtube.com/watch?v=ty0C8RyjWqw

Meta Info

• TFC Version: 1.0.6.133
• theoneprobe, journeymap, jei (the mods where not necessary but they where in the video I recorded. I later on went back and retried it without the mods installed and it still happened.)