Field of technology: Industrial Machinery and Processes
Patent granted on: Tue, 05 May 2020
A drain valve to drain water from a dry barrel hydrant includes a drain valve body fixed to a main valve assembly of the hydrant, and a hollow drain hole sleeve positioned in a drain hole of an elbow of the hydrant. The drain valve body includes a drain valve facing configured to align with the drain hole of the elbow as a result of the main valve assembly being in an open position, and to not align with the drain hole of the elbow as a result of the main valve assembly being in a closed position. In another embodiment, an elbow of a fire hydrant includes a hollow body, an upper end defining a drain hole to allow water to drain out, and a hollow drain hole sleeve in the drain hole.