Delta Faucet is one of the first in the industry to qualify for the new WaterSense(R) program developed by the EPA for showerheads and handshowers. Water Efficient Product meeting CALGreen standards. White Water Efficient Showerhead. 1.5 gpm, 5.7 L/min. Getting ready in the morning is far from routine when you’re surrounded by a room and in the company of a faucet that reflects your personal style.