Fluidmaster Inc. is a worldwide supplier of plumbing products. The company is determined to aid in the conservation of scarce fresh water resources as well as to enable people worldwide to enjoy the health benefits of safe and reliable sanitation. This requires a cost effective flushing system that uses a consistent low volume of water regardless of variations in supply water pressure and toilet resistance. The Harvey Mudd College Fluidmaster Clinic team has designed and prototyped two concepts that accomplish this task.