AFS-50 is a compact compressed breathing air filtration system that removes oil, water, solid particles and odors from a compressed air system. AFS-50 system incorporates a unique three-stage filtration concept which utilizes a prefilter, high-efficiency coalescer filter and charcoal adsorber element. The system provides uniform air distribution to four supplied-air respirators and a fifth quick-disconnect can be used for connecting a carbon monoxide monitor or an additional respirator. AFS-50 is compatible with a variety of ENMET carbon monoxide and oxygen monitors.