Traditionally, the standard 3.6 gallon flush toilet is responsible for approximately 30% of a household’s water consumption. The newer conserving flush toilets drop that in half, to 1.8 gallons. Enter the even newer dual flush toilets. Didn’t take a dump this time, only a pee? Press the correct button, and you only use .9 gallons, vs. the 1.8 gallons the other button offers for a solids flush. If you can’t or won’t use a composting toilet, this is a serious water saver. Most manufacturers list the tank, bowl, and lid separately, so make sure you order all the correct components.