- Author
- Golden, G. E. | Hunter, R. B.
- Title
- Backflow Prevention in Over-Rim Water Supplied.
- Coporate
- National Bureau of Standards, Washington, DC
- Report
- BMS 28, August 24, 1939, 19 p.
- Keywords
- water supply | plumbing
- Identifiers
- tubes; backflow; faucets; air gap
- Abstract
- This report describes the methods used and the results obtained in the investigation of the prevention of backflow from plumbing fixtures with over-rim supply by means of air gaps between the supply opening and the highest possible liquid level in the fixture. The previous work is discussed and the data necessary for a complete understanding of the subject are presented. The treatment has been developed from the point of view of the construction of the supply fitting as well as its location with respect to the fixture. Finally, recommendations are offered in a form suitable for use in field inspection.