The SH-1.5ADP water reducer is designed to decrease showerhead water consumption. The unit is adaptable to any of the manufacturer's showerheads. Through the injection of air into the adapter, the showerhead's flow is reduced to 1.5 gpm while giving the user the same feeling as using a 2.5-gpm showerhead, the manufacturer says. 800-842-7277. www.watermark-designs.com.