FAQ <p> What is an overflow drain and where is it located? <p> An overflow drain prevents your bathtub from overflowing and it is located above the water sprout. Fundamentally it's a great idea to have an overflow drain but it causes you to have lower water levels since it prevents water from passing the overflow drain when you take a bath. With the Essentially Yours Overflow Drain Cover, you are able to increase your water levels and have a deeper bath while negating the risk of having an overflow. With a deeper bath you will be able to sustain your desired water temperature for a longer period of time* Furthermore, if you have young children the cover will protect your child from bumping into the overflow drain. In addition customers are reporting the drain cover is able to silence "gurgling" drain noise while having a bath. Some customers have waited 15 years to eliminate all of these issues to finally have a relaxing bath. Essentially Yours!