Self-contained breathing apparatus; required components.

(a) Each self-contained breathing apparatus described in § 84.70 shall, where its design requires, contain the following component parts: (1) Facepiece or mouthpiece, and noseclip; (2) Respirable breathing gas container; (3) Supply of respirable breathing gas; (4) Gas pressure or liquid level gages; (5) Timer; (6) Remaining service life indicator or warning device; (7) Hand-operated valves; (8) Breathing bag; (9) Safety relief valve or safety relief system; and (10) Harness. (b) The components of each self-contained breathing apparatus shall meet the minimum construction requirements set forth in subpart G of this part.