# Backflow.

- **operation:** document
- **citation:** 49 CFR 193.2227
- **title:** Backflow.
- **source type:** regulation
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** historical
- **official:** true
- **published on:** Not available
- **effective on:** 1999-10-01
- **summary:** (a) Each transfer system must operate with a means to—

(1) Prevent backflow of liquid from a receiving container, tank car, or tank truck from causing a hazardous condition; and

(2) Maintain one-way flow where necessary for the integrity or safe operation of the LNG facility.

(b) The means provid
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- **markdown:** https://regulus.evalyn.ai/document/49-cfr-193-2227.md
- **app url:** https://regulus.evalyn.ai/document/49-cfr-193-2227
- **source url:** https://www.govinfo.gov/app/details/CFR-1999-title49-vol3/CFR-1999-title49-vol3-sec193-2227
**body:**

(a) Each transfer system must operate with a means to—

(1) Prevent backflow of liquid from a receiving container, tank car, or tank truck from causing a hazardous condition; and

(2) Maintain one-way flow where necessary for the integrity or safe operation of the LNG facility.

(b) The means provided under paragraph (a)(1) of this section must be located as close as practical to the point of connection of the transfer system and the receiving container, tank car, or tank truck.
- **truncated:** false
- **body characters:** 483