What is an overflow?
It is a “Water Break” for bathtubs. Technically, it will prevent a bathtub from overflowing with water and flooding your whole bathroom or house. Once the water reaches a certain level in the bathtub, it starts to drain through the overflow. So if you would ever walk away from your filling bathtub and forget about it, your overflow would prevent you from a flood, but not from a high water bill!
It is a Water Break for bathtubs. Technically, it will prevent a bathtub from overflowing with water and flooding your whole bathroom or house. Once the water reaches a certain level in the bathtub, it starts to drain through the overflow. So if you would ever walk away from your filling bathtub and forget about it, your overflow would prevent you from a flood, but not from a high water bill!