This is a picture of the early Sherwood 2nd stage. The following warning is
for only the Orange colored models made during the mid 1980s. Many of these
low cost octopus units are still in use, but should all be removed from
service due to the very high risk of failure.
  We were told that these Orange models did not have a UV stabilizer added to
the plastic housing material. After exposure to sunlight these housings would
become very brittle like a egg shell, and they all tend to crack where the
L.P. hose attaches to the housing body.
  In several cases the complete internal demand module assembly would break
free from the housing body while the unit was in use. This would not only
totally shut off the divers air, but will provide a large 1/2" ID hole in the
2nd stage body allowing a large volume of sea water to enter during the
divers next breath.
  Several examples of this defective octopus regulator that have caused near
death for the users. Several examples have been provided to the Sherwood
rep's, and to the factory over the years. Sherwood is well aware of the
problem but they refuse to notify the public, or recall the regulators, or
replace the product with a safe replacement because they feel it is out of
the 1 year product warranty time period.
  We suggest all owners of these Orange colored models have them inspected
for small stress cracks where the LP feed hose fitting enters the body, and
remove them from all future service. Those regulator owners who have had
already had these units fail should retain all the small parts, take
pictures, and contact the CPSC website to file a defective product report.
http://www.cpsc.gov/cpscpub.

Picture of the failure point and where to examin the body for cracks.

Picture of demand module that pulls out of regulator body.