BS 5306-9 is a British Standard that discusses fire extinguishing installations and equipment on-premises. This new part of the BS 5306 series brings together and updates the two parts of BS 6643, providing all recommendations for the recharging of portable fire extinguishers in a single standard. BS 5306-9 is the ninth part of the series that gives recommendations for the recharging of portable fire extinguishers and for components, gas cartridges, propellants, and refill extinguishing media for extinguishers.