Hydrant spanner is a tool for opening valve of fire hydrant: Material: ... , aluminum; Size: 1.5" , 2", 2.5"; many types. hydrant spanner is a tool for opening valve of fire hydrant; may ... be simple spanner, box wrench, or adjustable wrench, or a specialized tool for ... test.F) We are the qualified member of NFPA. Hydrant Spanner