In early October, Scubapro and the U.S. Consumer
Product Safety Commission issued a recall of the
Scubapro MK20 first stage. If someone servicing the regulator
over-tightens the yoke or DIN retainer, it could
cause a stress crack that might ultimately interrupt air
supply. Divers should stop using the regulators immediately
and bring them to any Scubapro dealer, where the
retainer will be modified (with a so-called “upgrade kit”)
to prohibit over-tightening.
 This recall comes more than 16 months after the
  problem first surfaced. In June 2005, Undercurrent reported that the National Oceanic and Atmospheric
  Administration (NOAA) had ordered all their Scubapro
  MK20 regulators out of the water after four first stages
  cracked. Scubapro, which had stopped selling the
  MK20 in 2001, replaced NOAA’s MK20s with MK25
  models, which do not allow over-torqueing. A spokesperson
  for Johnson Outdoors, the parent company of
  Scubapro, told Undercurrent that the NOAA reports were
  the only cracking incidents the company was aware of.
  Subsequently, however, we learned otherwise.
 After our article appeared, we heard from several
  readers whose MK20s or similar models had failed. Jim
  Reilly (Lafayette Hill, PA) said, “I sent them not one,
  but two emails asking if my regulator was safe to use and
  never got an answer.” He then took his three MK20s
  to his local dealer where he was told that the regional
  Scubapro representative had directed dealers to offer
  a discounted trade-in on an MK25. For $220 the shop
  upgraded his MK20s to MK25s.
However, in May 2005 Scubapro had quietly begun
  making its upgrade kits available to dealers, but only
  if requested. In other words, a diver had to hear
  about the problem (eventually a notice appeared on
  Scubapro’s website) and ask for a repair. Unlike Reilly,
  they would not have to pay for the upgrade.
 When we told Johnson Outdoors’ spokesperson
  Cynthia Georgeson, she said: “Since the initial stories
  appeared and our dealers receiving the service update
  resolving it, we have received a few additional cracked
  units. . . At Johnson Outdoors, diver safety comes first
  and we are confident that based on these independent
  findings, our recent MK20 service update is the right
  and appropriate step to help prevent issues in the
  future.”
 After the recall, we called Georgeson to ask why
  there was more than a year’s delay between their discovering
  the problem and the recall. She replied, “We
  issued the recall to make sure we’d made every attempt
  to reach the broadest number of dealers and consumers.”
  Georgeson insisted that there had been no new
  incidents in the intervening 15 months. Nevertheless,
  unless an owner of one of the 48,500 regulators that
  were recalled went to a dealer, or read of the problem
  on the Scubapro website or in Undercurrent, they would
  not know of the potential problem.
 After questioning by Undercurrent, she called to confirm
  that warranty holders would now be notified of the
  recall by postcard. But don’t be surprised that you read
  it here first.