Incident Report

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Incident Report 2020-05-01T16:26:00+00:00

Kingfisher Valve Defects

Incident Date


Incident Description

1970s - Kingfisher valve: an English valve made by Submarine and Safety Engineering Ltd. with an international thread adaptor. This valve was initially much favoured being cheap and apparently good. In practice the first stage could unscrew itself from the adaptor and pieces fell off including the mouthpiece and exhaust fins. The purge button could also jam inside the housing permanently turning the valve on. However all divers managed to extricate themselves.

Lessons Learned

Use suitable demand valves.
Line Management Negligible
Gas Management Negligible
Equipment Management Negligible
Equipment Failure Major
Training Negligible
Medical Negligible
Planning Negligible
Procedural Error Negligible
Cave Environment Negligible
Weather Negligible
Other Factor Unknown