It depends on you and what kind of shower you want to take. The showerhead supports two different modes - a “continuous flow” mode, where the water is continuously flowing, and a “quick rinse” mode, where the water comes out in spurts when you press a button. We’ve found that people who use the “quick rinse” method of showering use very little extra water and it’s a very efficient way to shower. However, even those who prefer a more traditional shower with a continuous flow have the benefit of knowing that the showerhead is already designed as “low flow” and uses 1.75 gallons of water per minute. Compared to a shower at home that uses 2.5 gallons of water per minute, the Tetravan shower is way more efficient! However, you’ll still want to limit your shower time - the average Sprinter van water tank is 25 gallons, which means all your water would be gone if you took a luxurious 15 minute shower.