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Potential problems with Hy Flex fire extinguishers
One of our members has informed us that the suppliers of HyFlex fire extinguishers have advised them that there is a potential problem with their DDC fire extinguishers. Following a study of the units, it has been discovered that the M3 grub screw set into the handle, which acts as the main valve, is missing from some of the units.
While operating a faulty unit, only the handle acts on the pin, and consequently causes malfunction of the unit. Therefore all units need to be checked to ensure that the relevant screw is in place.
Should the screw be missing, then the extinguisher should either be removed from service until a replacement screw is available or a competent person should fit a compatible M3 screw to the handle and adjust accordingly.
Safety Event
Published: 1 May 1997
Download: 
IMCA SF 03/97
IMCA Safety Flashes
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IMCA Safety Flashes summarise key safety matters and incidents, allowing lessons to be more easily learnt for the benefit of all. The effectiveness of the IMCA Safety Flash system depends on Members sharing information and so avoiding repeat incidents. Please consider adding [email protected] to your internal distribution list for safety alerts or manually submitting information on incidents you consider may be relevant. All information is anonymised or sanitised, as appropriate.
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IMCA makes every effort to ensure the accuracy and reliability of the data contained in the documents it publishes, but IMCA shall not be liable for any guidance and/or recommendation and/or statement herein contained. The information contained in this document does not fulfil or replace any individual’s or Member's legal, regulatory or other duties or obligations in respect of their operations. Individuals and Members remain solely responsible for the safe, lawful and proper conduct of their operations.