The Crouse-Hinds ECD15 1/2-Inch Universal Drain Breather provides ventilation to minimize condensation. It has the capability to pass 50 cc of water per minute and .2-Cubic Feet of air per minute at atmospheric pressure. From the modest upstate New York beginnings in 1897, Crouse-Hinds has grown into a worldwide organization that manufactures or markets products on every continent. Through aggressive leadership in product innovation, engineering, manufacturing, distribution and technical support we have quite literally, set the standards by which other manufactures in our industry are measured. Also known as -Crouse-Hinds ECD15 1/2 in. Universal Drain