Placing a brick inside the toilet tank to save water is a time-honored trick. It’s an easy DIY method that doesn’t require a residential plumber’s intervention. The method makes sense when you consider that the toilet itself makes up about a third of indoor water use. However, is this tactic really as useful as it seems? Is it one we recommend?
Does a Toilet Tank Brick Really Save Water?
The short answer is yes. A brick in the toilet tank does curtail water use every time you flush the toilet. Most toilets actually don’t use a lot of water to begin with. Most models manufactured after the early 1990s only use about 1.6 gallons per flush. Some use as little water as 1.28 gallons. Older models, however, use around 3.5 gallons, with some using as much as 6 gallons. That is a lot of water for a single flush.
However, toilets may not flush properly if they don’t use the amount of water they’re designed to use. For sanitary reasons, you want the waste to be flushed properly and not stuck in the sewage line. If waste becomes stuck, you’ll need to bring in an emergency plumber. Toilets require the designated amount of water to shuttle waste along the pipes and prevent clogging.
To save water, we recommend investing in a newer toilet model if you have a pre-90s toilet. If you still insist on using the brick method, then use a plastic bottle filled with sand or rocks. A brick can erode in water. Continue Reading →