Last amended:2015Year:2026Length:39 wordsSubsections:2Official source
Cite as 42 C.F.R. § 84.158 (2026)
(a) Dry exhalation valves and valve seats will be subjected to a suction of 25 mm. water-column height while in a normal operating position.
(b) Leakage between the valve and valve seat shall not exceed 30 milliliters per minute.