According to certain embodiments, an adapter assembly for a bottom outlet valve comprises an apparatus configured to be coupled to a stem of the bottom outlet valve of the railroad car. The stem of the bottom outlet valve is aligned generally with a longitudinal axis of the railroad car. The apparatus comprises a coupler configured to be coupled to the stem of the bottom outlet valve and a primary gear coupled to the coupler. The primary gear is configured to be coupled to a handle assembly extending from either side of the railroad car. The handle assembly is configured to operate the bottom outlet valve.