In Minecraft, when you use a bucket to get water, or you dig out a block on a shore line, most of the time the water around it fills to turn it into a normal water block, this way a small pool of water can be used as an infinite water source (e.g. a 3x3 well with water placed in all 4 corners, the center block will always refill).
With Combustion Engines in the BuildCraft Mod, you can cool them down with water from buckets or through pipes. I am wondering: if I had a block of water which always refilled when I would use a bucket, and I was to draw water from that point with a pipe for a Combustion Engine, would the water still be infinite?
Edit: I do not use Feed The Beast, but I have installed BuildCraft Stable 6.0 manually.