From the Manufacturer
The Crouse-Hinds EYD6 Condulet Sealing Female Fitting With Drain, 2-Inch is made to restrict the passage of gases, vapors or flames from one portion of the electrical installation to another at atmospheric pressure and normal ambient temperatures. It prevents precompression or "pressure piling" in conduit systems. This drain sealing fitting is installed in vertical conduit runs and at low points in conduit systems to prevent accumulation of condensate above the seal. 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.