Backflow prevention

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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.

wilkins_720_1.jpg

Backflow prevention device.

Source: https://www.sprinklerwarehouse.com/Wilkins-Pressure-Vacuum-Breaker-p/wk720a-075.htmbr>