If you are wondering what on earth are waterless urinals, well, as the name suggests they do not use water at all to flush. Honestly, initially the idea did not appeal to me at all, because I kept wondering about the hygiene and the cleanliness of these urinals. But after reading about how these waterless urinals function, all my fears and apprehensions disappeared (Bodily fluids flow into a cartridge which collects “uric sediment” before passing through a layer of liquid sealant and heading down the drain) According to Falcon Waterfree Technologies (one of the leading manufacturers of waterless urinals), each of their Falcon Waterfree urinal can save up to 40,000 gallons (151,000 liters) of fresh water per year. Now, that’s a lot – think about it that this amount of water does not need to be transported to the urinal or away from it to the water treatment facility too (which ends up saving precious energy). Not only is no energy used to treat this water, it does not even produce carbon dioxide emissions as a byproduct of its treatment. Maintenance is easy too – all one would need to do is change the cartridge approximately three to four times per year. Do you know how much water is used by an average urinal flush? Approximately two liters! Think about it how much water can be saved if more businesses and public services start using these waterless urinals. via: Greendaily
