Check clamps and rings to ensure that they are tight, properly located, not dented and not excessively corroded. Wash the breathing tube separately and allow to air dry. If it is permanently attached to the facepiece, allow the breathing tube to dry for several days before using. High-pressure hose Check the hose for cuts, bubbles and abrasions. Check the fitting between the high-pressure hose and the regulator for damage.
Audible alarm Check the audible alarm for damage.
Clean bells or whistles. Ensure that the alarm is working. Remove the unit from service. Backpack Inspect the straps of the backpack for excessive wear, broken stitching, and damaged or missing hardware. Inspect for cuts or gouges that can cause the unraveling of the composite fibers of the cylinder overwrap.