But replacing your toilet with one that meets the WaterSense standards can help you save up to 13,000 gallons of water and more than $140 every year. But is 1.6—or 1.28—gallons enough water to ...

One-piece vs. two. You may also want to consider a one-piece toilet, where the tank and bowl are molded seamlessly as a single unit, for its sleeker styling and easier cleaning.