Posted By Dave Dowan Hi Michael Hope thsi helps Servicing of Extinguishers Extinguishers need regular servicing, with discharge tests carried out every four years in the case of water, foam, aqueous film-forming foam (AFFF) and dry powder (stored pressure types). Discharge tests should be carried out every five years for cartridge-operated types. It is recommended that pressure tesing of carbon dioxide type Extinguishers should be carried out on a 10-year basis, unless the equipment is serviced regularly, in which case the pressure tesing period may be extended to 20 years. The average life span of an Extinguisher containing water, foam or aqueous film forming foam falls between 10 and 15 years, whereas carbon dioxide types may last up to 20 years Regards Dave

Posted By George Wedgwood There are a lot of past Threads on this topic, Michael - go to 'search forums' and put in 'fire extinguishers' and 'iosh discussion Forum' to see them. have a particular look at this one; http://www.iosh.co.uk/in...iew&forum=1&thread=20020