---
kind: "section"
citation: "46 C.F.R. § 197.456"
title: "46"
number: "197.456"
heading: "Breathing supply hoses."
url: "https://uscodex.org/cfr/46/197.456"
---

# §197.456. Breathing supply hoses.

- (a) The diving supervisor shall insure that—
  - (1) Each breathing supply hose is pressure tested prior to being placed into initial service and every 24 months thereafter to 1.5 times its maximum working pressure;
  - (2) Each breathing supply hose assembly, prior to being placed into initial service and after any repair, modification, or alteration, is tensile tested by—
    - (i) Subjecting each hose-to-fitting connection to a 200 pound axial load; and
    - (ii) Passing a visual examination for evidence of separation, slippage, or other damage to the assembly;
  - (3) **Each breathing supply hose is periodically checked for—**
    - (i) Damage which is likely to affect pressure integrity; and
    - (ii) Contamination which is likely to affect the purity of the breathing mixture delivered to the diver; and
  - (4) **The open ends of each breathing supply hose are taped, capped, or plugged when not in use.**
- (b) To meet the requirements of [paragraph (a)(3)](#a-3) of this section, each breathing supply hose must be—
  - (1) Carefully inspected before being shipped to the dive location;
  - (2) Visually checked during daily operation; and
  - (3) **Checked for noxious or offensive odor before each diving operation.**

## Notes

### Authority

Authority: 33 U.S.C. 1509; 43 U.S.C. 1333; 46 U.S.C. 3306, 3703, 6101; Department of Homeland Security Delegation No. 0170.1.

### Source

Source: CGD 76-009, 43 FR 53683, Nov. 16, 1978, unless otherwise noted.