Commercial and industrial property insurer FM Global has recommended its customers identify and remove O-ring sprinklers after the manufacturer, Central Sprinkler Company, voluntarily recalled 35 million fire sprinklers.

It was feared the sprinklers would not perform properly in the event of a fire and Central Sprinkler has offered free replacements, including labour.

FM Global senior engineering specialist Joseph Hankins said there was a need to take action, but not to panic.

A total of 67 sprinkler models are involved, under the brand names Central, Grinnell, Gem and Star, with the words “Central” or “Star”, the letters “CSC” or “G” in a triangle or a star-shaped symbol stamped on them.

The problems with the sprinklers include leakage, encrustation and corrosion that could prevent the sprinkler from working in a fire.