Water As Extinguishing Safety Sign (PV4)

The Water Prohibited as Extinguishing Agent safety sign indicates that water should not be used to extinguish fires in certain situations. It is crucial in areas where electricity, flammable liquids, greases, gases, or combustible metals (such as sodium, titanium, or magnesium) are present, as water can exacerbate these types of fires.

This sign is often used in conjunction with the Beware of Electric Shock safety sign (WW7) to ensure comprehensive safety measures are in place.