When you hop in the tub to hose off after a long day, a 2.5 GPM nozzle uses about 20 gallons of water if you are in there for about 10 minutes. If you shower every day (as you should!) you will save, on average, about 1,825 gallons of water simply from swapping out your 2.5 GPM nozzle to a 2.0 nozzle. That’s a lot of water!