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Bulletin #09 of 2014

Interior Title: 
Bulletin #9 of 2014
Title Type: 
Caution Bulletin
Bulletin Date: 
Bulletin #9 of 2014. August 25, 2014 (UPDATED January 27, 2016)
Bulletin Type: 
Caution Bulletin
Bulletin Subject: 
Regarding Second Stages Used with M-48 SuperMask® (P/N 800-048) and M-48 MOD 1 (P/N 800-150)

Most 2nd stage regulators on the market can be used with the M-48 SCUBA POD P/N 805-015. Size and shape matter when choosing a non-Kirby Morgan regulator to fit into your SCUBA POD; in general there are three criteria which must be met:

  1. The regulator mounting tube must have a single lip.
  2. The mounting tube should be at least a length of .5 inches at the shortest measurement.
  3. The Kirby Morgan mouthpiece, P/N 810-022L, must fit snug completely around the mounting tube regardless of it shape.


Testing conditions of the M-48 SuperMask® and MOD-1 masks using pilot assisted, or servo regulators, were found to exhibit higher levels of internal mask pressures when applying the purge button feature. These levels were above the allowable limit.

This should be taken into consideration when choosing a second stage for use with either mask.

Always refer to the SuperMask® or MOD-1 User Guide section on Mounting Open Circuit Demand Regulators when installing any demand regulator to the M-48 SCUBA POD.

Please contact your local KMDSI dealer or e-mail [email protected] for more information.