Fire extinguisher CO types have the test information stamped on the cylinder, all other types get a sticker on the back of the cylinder. Once dry, the units are recharged. Unlike the UK, the US does not rebuild extinguishers and replace valves at specific intervals unless parts are found to be defective, with the exception of halon. Halon types are often given new o-rings and valve stems at every internal maintenance to minimize any leakage potential. OEM equipment must be used for replacement parts for the extinguisher to maintain its UL rating. If parts are unavailable, replacement is recommended, keep in mind
Chubb Fire for tackling cooking oil fires, and the Pyromet™ extinguisher for fighting Class D metal fires. Each product is available with ancillary equipment including stands, mobile trolleys, and internal/external covers. Chubb Fire Chubb Fire & Security is a fire and security business. It is owned by United Technologies Corporation. Read and Campbell, the oldest company of those which came together to form Chubb Fire Security Limited. Their invention of the CO2 Cartridge to expel the contents of a fire extinguisher is still today the most common method in use. Read and Campbell are mainly remembered for their 'Waterloo' and 'Petrolex' brand