(01/05/2012 10:09 AM)trademark91 Wrote:  The difference between kitchen water and bathroom water is more often than not, softener. Softening water is a process of removing minerals from the water, often using salt (ever see those big bags of salt chips? that's for water softeners) They do this because if you leave the minerals in the water, when the water dries up, it leaves behind stuff like calcium and lime, and can even have soap work not as well. Softened water is bad to drink, however, so kitchen sinks don't use the stuff.