Water is a fluid that can only be placed by the player when using a bucket (unless spawned in to the player's inventory). On newly-generated maps, water is common at ocean level also known as sea level (elevation 62) in the form of lakes. It also appears in pools, springs underground and lakes above ground. It can also be found in Village Wells, Desert Wells and sometimes as Springs / Waterfalls from a cliffside.
Water cannot be found in The Nether and water from a bucket will evaporate as soon as it touches anything in there (cauldrons excepted). Water "blocks" obtained through inventory editing or crafted with UU-Matter can still be placed in The Nether.
Water reduces light by 2 for every block, in addition to normal dispersion.
Recipe[]
Video Tutorials[]
This video will show you how to use the buildcraft pump to obtain water.
How To Use The Pump Feed The Beast Tutorial - Ep. 12 (DuhWynning)-1373293642
Video made by DuhWynning
Sources: Minecraft Wiki @ http://www.minecraftwiki.net/wiki/Water