The manufacturer issued the following statement via social media.
"Our NX700 regulators are made for us in Italy, by a renowned manufacturer with many years of experience in this type of product. Before market launch, we have extensively tested them during many months of rigorous tests in extremely demanding conditions.
Unfortunately, during routine periodical maintenance servicing of some NX700 1st stages, in singular cases, we have detected some traces above-standard signs of the wear of the membrane.
The purpose of EN250:2000 was to ensure a minimum level of safe operation for 'Open Circuit Self Contained Compressed Air Diving Apparatus' down to a maximum depth of 50 metres / 164 feet. This European Standard also specified that regulators must be independently tested to ensure they meet these minimum requirements.