Newer shower heads may use about 2 to 3 gpm. The shower heads designed to use less water differ in spray patterns, mounting and functions. Some low-flow shower heads offer selections for spray patterns. Others offer settings that provide a very low flow for shampooing. Some have a shutoff switch.
Spray patterns vary from mist, sharp, wide, to massage or pulsating.
The spray pattern is changed by rotating either the shower head or a ring around the head, or by twisting a lever or changing a dial. Check to see which is most convenient for you and others to use. Selecting the shower head device may depend on your existing shower installation. Most shower heads mount directly onto the shower pipe. Some are available on a flexible hose and can be mounted on a bracket attached to the pipe, allowing the shower head to be hand-held.