The Woodford commercial Model 67 is an automatic draining, freezeless wall hydrant that includes a high-flow Nidel Model 50HA double-check backflow preventer. Hydrant drains as handle is shut off, even if hose is attached. To close and drain hydrant, turn key clockwise until seated and water drains out of opening, or hydrant may freeze and burst. No sprayback when hydrant is shut off. Woodford, the Choice of Professionals.