Are you referring to...
- the method of obtaining it? You can get water by placing a pump on a water tile, then laying conduits away from it into the block you want the water to go.
- the method of transporting it? Use conduits; they transport water similarly to how conveyors transport items. The Liquid Router also works the same way as the normal router, so you can use that to split a conduit into 3 other conduits or blocks simultaneously.
It's also worth noting that you can lay conveyors across water to act as a walk-able bridge.