What is an Overflow Drain?
Overflow drains are secondary drains that work in tandem with primary drains to prevent an overflow or spillage of liquid out of some type of receptacle. The main function of an overflow drain is to ensure that damage is not caused to the area surrounding the receptacle as a result of the liquid reaching the rim of the container and flowing into the area unchecked. An overflow drain is often located an equitable distance from the lip or rim, but still significantly higher than the primary drain located at the bottom of the receptacle. A classic example of an overflow drain is found in many homes. Most bathroom tubs and sinks are equipped with this secondary drain as a means of preventing water from spilling onto the surrounding floor and causing water damage. With the tub, the overflow drain is often located several inches below the tub rim and helps to minimize the chances of the tub overflowing while a bath is being drawn. People who have gone to answer a doorbell or a telephone whil
