That means no weight loss. Keep in mind that water also rids the body of metabolic waste , and as you lose weight you have much more metabolic waste than normal. The heavier you are, the more water you need to make sure these processes function smoothly. Water maintains muscle tone. It is a primary part of the process of contraction.
Water also prevents sagging skin after weight loss by keeping it firm.
Water prevents constipation. The CO2 gets breathed out immediately, while the water takes a while to leave the system. Eventually your body will be used to the amount of water you drink, and the bathroom trips will lessen over time. Try drinking some fruit juices, skim milk, and eating juicy fruits. While all these things will help, nothing is as good as pure water.