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
Bradford City stadium fire warmer; one of them ran to the back of the stand for a fire extinguisher but found none. A police officer shouted to a colleague for an extinguisher. However, his call was misheard and instead the fire brigade were radioed. The call was timed at 3:43 pm. However, the fire escalated rapidly and flames became visible, and so police started to evacuate the stand. The blaze began to spread; the roof and wooden stands were soon on fire. One eyewitness, Geoffrey Mitchell, told the BBC: "It spread like a flash. I've never seen anything like it. The smoke was choking.