Your old toilet uses a lot of water. Easily one of the best things you can do for your home and environment is replace your old toilet with a new water – saving model. Low flow toilets have been required in new construction for years. There are new models on the market that use as little as 1.1 gpf (gallons per flush). That is an amazingly small amount of water to flush the toilet. Options and styles are limitless, so when it is time to shop for that toilet, take your time and check out all the styles and models before making your decision.