To save water when flushing your toilet, remove the tank lid and put a brick into the tank. This replaces some of the water that would normally go down the drain. In time you will notice a slight reduction in your water bill depending on use.
Never, EVER use a brick for this purpose! I learned that the hard way, when a brick ultimately ruined our toilet.
As another poster mentioned, current toilets are already low-flow. But if you have an older toilet, use a plastic bottle (NEVER glass--it can break in the tank!). Fill it with water, then place it away from any parts of the flushing mechanism. :-)
I've heard that the brick will break down after some time. I re-use a plastic or glass mayonnaise jar. Fill it with water, empty the tank and place in the corner. Those quarts + you save sure add up.
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