The patented Woodford® RHY1-MS is intended for irrigation purposes and to provide water availability on commercial building roofs. Applications include window washing, cleaning of condenser coils, cooling towers and other types of roof equipment. The hydrant valve body is drilled and tapped with 1/8 in drain hole which must be piped to a drain location. The RHY1-MS allows for installation flexibility since it is not necessary to install hydrant when hydrant support is mounted to the roof. The hydrant support utilizes a 3 in opening that allows the hydrant to be installed later if desired. All necessary mounting hardware for proper installation on a commercial roof is supplied, including a 2 degree shim for pitch adjustment.