"The Tank" houses and supplies the first 50' of Lifeline Firehose with air. Can be used to supply air to air tools, air bags, confined space rescue, or directly to a SCBA face mask once the situation is no longer IDLH, such as in overhaul. Unit houses up to three 4500PSI air bottles of multiple sizes in order to supply air and regulate the pressure to a usable 125-150 PSI range.