TO: Users of SCOTT SAFETY SCBA Full Facepiece: AV-3000 SureSeal , AV-3000 HT, AV-2000, and other similar designs
FROM: Division Chief of Safety Don Schwab, City of Everett Fire Department
DATE: July 13, 2016
SUBJECT: Dislodged Sizing Dot Inside Regulator Diaphragm
Recently one of our firefighters experienced smoke inhalation during a training incident. The exposure was caused by a dislodged sizing dot found wedged in the regulator diaphragm. This allowed outside contaminated air to enter into the mask.
The sizing dots are originally attached by adhesive during the manufacturing process. They are black or color coded by size. Figure 1 shows the sizing dots as they come from the manufacturer. Figure 2 shows a mask with missing sizing dots.