Since 1994, showerheads have been required to emit approximately 2.2 gpm. A maximum 2.5 gpm has been shown to be efficient. While the 1.5 gpm showerhead is sufficient, if there should be a pressure drop, such as might occur when more than one shower is in use, the actual amount of water is decreased to a point where efficiency is lost and savings are questionable. Rather than rinse thoroughly in a short period of time, the user is chilled by the small spray of water and remains under the spray longer to rinse completely. Current technology has been used effectively to maintain the limits placed on showerheads by the new codes.
Showerheads are efficient and available in many designs.
For example, American Standard has designed showerheads and adjustable shower systems to provide a better spray pattern than the older showerheads. Greater efficiency showerheads provide a drenching and enjoyable shower while preventing water waste. The 2.5 gpm showerheads from Powers Process Controls are available with either gooseneck or standard spout and in a standard or modular surface mount system. In both models, the water temperature is preset and is maintained within three degrees of that set point. Symmons' TempControl is a thermostatic water controller which regulates the water supply to multiple showers.