42 CFR 84.173
§ 84.173 Exhalation valve leakage test.
United States · 42 CFR — Public Health · Status: effective
Cite this
- Citation
- 42 CFR 84.173, § 84.173 Exhalation valve leakage test, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/201782
- Permanent ID
ys:prov:201782@1- SHA-256
91dbec2717f50a99abcab3af96d6af62fd59a958b6fd5d0a205c33acbcd8cb1f
The hash is SHA-256 of this version's text, with every run of whitespace collapsed to a single space and the ends trimmed. The ID always leads back here, and checking it says whether the text you cited is still the current version.
Full text
(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 must not exceed 30 mL per minute.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.