1910.430(c): Diving Breathing Gas Hoses
Breathing gas supply hoses must have a working pressure at least equal to the whole system, a bursting pressure at least 4 times working pressure, be tested at least annually to 1.5 times working pressure, and have open ends taped, capped or plugged when not in use. Connectors must be corrosion-resistant and resist accidental disengagement, and umbilicals must be marked and kink-resistant as specified.
Key takeaways
- 1910.430(c) is part of OSHA's general industry standards (29 CFR Part 1910, Subpart T).
- OSHA cited it 2 times in the last 3 years, in 2 inspections, with $3,227 in current penalties.
- 2 deaths are linked to inspections that cited this rule.
- Related part: 1910.430(c)(1) (1 citations).
- Free 5-minute toolbox talk for your crew below.
In this article
What this rule covers
29 CFR 1910.430(c) ("Breathing gas supply hoses") is one requirement inside 1910.430 Equipment, an OSHA general industry standard (Part 1910, Subpart T). It includes 13 sub-paragraphs. The official text below is copied word for word from the Electronic Code of Federal Regulations (eCFR). The numbers, injury cases and training on this page show how OSHA enforces it on real job sites.
Official text
(c) Breathing gas supply hoses. 2 citations
(1) Breathing gas supply hoses shall: Open (c)(1) 1 citations
(i) Have a working pressure at least equal to the working pressure of the total breathing gas system;
(ii) Have a rated bursting pressure at least equal to 4 times the working pressure;
(iii) Be tested at least annually to 1.5 times their working pressure; and Open (c)(1)(iii) 1 citations
(iv) Have their open ends taped, capped or plugged when not in use.
(2) Breathing gas supply hose connectors shall: Open (c)(2) 1 citations
(i) Be made of corrosion-resistant materials;
(ii) Have a working pressure at least equal to the working pressure of the hose to which they are attached; and
(iii) Be resistant to accidental disengagement. Open (c)(2)(iii) 1 citations
(3) Umbilicals shall:
(i) Be marked in 10-ft. increments to 100 feet beginning at the diver's end, and in 50 ft. increments thereafter;
(ii) Be made of kink-resistant materials; and
(iii) Have a working pressure greater than the pressure equivalent to the maximum depth of the dive (relative to the supply source) plus 100 psi.
Source: eCFR, text current as of 2026-10-15. Read all of 1910.430.
Injuries linked to this rule
2 deaths are linked to inspections where OSHA cited 1910.430(c).
At 2:00 p.m. on June 25, 2024, an employee working as a commercial diver for a highway and bridge contractor had descended 19 feet to the ocean floor. The employee was acclimating himself for a commercial diving operation. The employeewas a new diver to the…
Full case list with employer, penalty, filters and download is part of OSHA Data (Purple Belt).
Unlock with Purple BeltWhere and how often it was cited
Free toolbox talk
A 5-minute crew talk on 1910.430(c), plus alerts when this rule changes. Free.
OSHA interpretation letters
None exist. OSHA has not published a letter of interpretation for 1910.430(c).
Related parts of this rule
- 1910.430(c)(1) 1 citations
- 1910.430(c)(1)(iii) 1 citations
- 1910.430(c)(2) 1 citations
- 1910.430(c)(2)(iii) 1 citations
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Frequently asked questions
How often are hoses tested?
At least annually to 1.5 times their working pressure.
What bursting pressure is required?
At least equal to 4 times the working pressure.
How are umbilicals marked?
In 10-ft. increments to 100 feet beginning at the diver's end, and in 50 ft. increments thereafter.
About this page
Sources
- 29 CFR 1910.430 (eCFR), text current as of 2026-10-15
- U.S. Department of Labor enforcement data: OSHA inspections, citations and accident records, copied nightly; data as of 2026-10-20
3-year window. Federal OSHA only; state-plan rules are not counted. Plain-language text is a summary, not legal advice; the official text controls. Black Belt Safety is not part of OSHA or the Department of Labor.