Attributes . Crouse-Hinds series ECD breathers and drains are for use in hazardous location conduit systems to drain accumulated condensate and provide ventilation to minimize condensation. A breather is installed in the top of an enclosure or in the upper section of a conduit system. A standard drain is installed in the bottom of an enclosure or in the lower section of a conduit system. At least one breather should be used with each drain. ECDs are also available in universal and combination models. A universal E . Names