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By Mark van der Feyst
How often do you drain the air in the SCBA cylinders? It is good to do so on regular intervals. When a cylinder is stored on a rack or on a fire apparatus, the air inside will go stale after a time period. The air will condense and expand over that time period due to an influx in the daily temperature.
Stale air is not fun or good to breathe — it needs to be changed out on a regular basis. A good schedule is every three months or sooner if desired.