It says there is a possibility of airflow being reduced significantly at low tank pressures (below 35 bar), although no incidents are said to have occurred to date.

The quality alert applies only to models with a new high-pressure seat that were assembled between 1 October 2017 and 25 May this year.

Huish says that the only products that could have been affected in UK and the rest of Europe would be service-kits with the new hp seat.

Dealers have now been supplied with replacement service-kits with the new seat and first-stage balance pins for retro-fitting to affected regulators.

Anyone who thinks they might possess one of the affected regulators is advised to stop diving with it immediately and follow the steps outlined here to check whether they require the free repair.

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Divernet - The Biggest Online Resource for Scuba Divers