---
kind: "section"
citation: "33 C.F.R. § 183.568"
title: "33"
number: "183.568"
heading: "Anti-siphon protection."
url: "https://uscodex.org/cfr/33/183.568"
---

# §183.568. Anti-siphon protection.


Each fuel line from the fuel tank to the fuel inlet connection on the carburetor must:

- (a) Be above the level of the tank top; or
- (b) **Have an anti-siphon device or an electrically operated fuel stop valve—**
  - (1) At the tank withdrawal fitting; or
  - (2) Installed so the line from the fuel tank is above the top of the tank; or
- (c) Provided that the fuel tank top is below the level of the carburetor inlet, be metallic fuel lines meeting the construction requirements of [§ 183.538](/cfr/33/183.538.md) or “USCG Type A1” hose, with one or two manual shutoff valves installed as follows:
  - (1) Directly at the fuel tank connection arranged to be readily accessible for operation from outside of the compartment, and
  - (2) If the length of fuel line from the tank outlet to the engine inlet is greater than 12 feet, a manual shutoff valve shall be installed at the fuel inlet connection to the engine.

## Notes

### Amendments

[CGD 74-209, 42 FR 5950, Jan. 31, 1977, as amended by CGD 81-092, 48 FR 55737, Dec. 15, 1983; CGD 85-098, 52 FR 19729, May 27, 1987]

### Source

Source: CGD 74-209, 42 FR 5950, Jan. 31, 1977, unless otherwise noted.

### Authority

Authority: 46 U.S.C. 4302; Pub. L. 103-206, 107 Stat. 2439; and Department of Homeland Security Delegation No. 0170.1, para. II, (92)(b). Subpart E is also authorized by Pub. L. 114-120, 130 Stat. 27

### Source

Source: CGD 72-61R, 37 FR 15782, Aug. 4, 1972, unless otherwise noted.

### Amendments

[CGD 74-209, 42 FR 5950, Jan. 31, 1977, as amended by CGD 81-092, 48 FR 55737, Dec. 15, 1983; CGD 85-098, 52 FR 19729, May 27, 1987]