Hydrant wrench


A hydrant wrench is a tool used to remove fire hydrant caps and open the valve of the hydrant. They are usually adjustable so as to fit different sized hydrant nuts.

In France

In France, The wrench is called "Guillemin wrench", but the firefighters call it "tricoise wrench". The curved part applies on the ring, and the hooked part clutches a notch.
Big tricoise wrenches are placed in fire trucks, and are mainly used to fasten the big hoses, e.g. ∅110 mm hoses to feed the pumper tank from the hydrant. Small tricoise are made of brass and hang at the fire belts; they are used to fasten the small hoses, e.g., ∅70mm to ∅22mm hoses.
The shape is sometimes adapted so it can be used as a tool for other purposes; it is then called "polycoise wrench" or "Deschamps wrench". These tools are used to
The shape of a hydrant wrench is sometimes adapted so it can be used as a tool for other purposes, such as: