Hydrant spanner is a tool for opening valve of fire hydrant: ... 2", 2.5"; many types. hydrant spanner is a tool for opening valve of fire hydrant; may be simple ... wrench, or adjustable wrench, or a specialized tool for use on "anti-vandalism" valves.A) Type: Storz type, Ansi Pin ... type, John Morris type, Nakajima type, Machino type and so on ...