On an average, conventional urinals use anywhere between 1 and 4 liters of water per use, depending upon how old they are. A typical man takes a leak four times on an average day in the office. With Zerodor, you can feel better about saving thousands of liters a year even in a small office. The good news is along with water, you save a lot of money on plumbing expenses, electricity bills and sewage treatment as well.