Backflow prevention
Revision as of 00:26, 24 February 2006 by Bennett.444 (talk | contribs)
1. The process of preventing contaminated water from flowing backward into a potable water supply. Backflow prevention equipment is required between field irrigation systems and incoming water supplies in most areas.
A sample of a backflow preventio device.
Source:http://www.igin.com/Irrigation/backflow.html