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Backflow Prevention
In 2012, the City of Larned revised its water cross-connection control rules to comply with federal and state law to require backflow prevention devices for lawn sprinkler systems. These systems must be tested annually. Cross connections are points at which the drinking water supply is interconnected with hazardous liquids, gases or other unsafe substances. The rules and regulations were established by the Kansas Department of Health & Environment in accordance with the Federal Safe Drinking Water Act.
When drinking water is pulled through the main line (when you use your sink, toilet, etc.), it can siphon water through one of your branch lines (sprinkler system line). When the water is siphoned, it pulls whatever is in the line with it. In a sprinkler system, herbicides and pesticides can be siphoned through the drinking water system through sprinkler heads. A backflow prevention device prevents water and contaminants from getting through.
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What is a Backflow Prevention Device?
Backflow prevention devices are mechanical devices that protect drinking water from hazardous contaminants found in lawn sprinkler systems (herbicides, pesticides, fertilizers, bacteria, and organisms), which may originate in the soil around sprinkler heads. Backflow prevention devices are installed where the water line comes into your house to prevent water from flowing backwards.When drinking water is pulled through the main line (when you use your sink, toilet, etc.), it can siphon water through one of your branch lines (sprinkler system line). When the water is siphoned, it pulls whatever is in the line with it. In a sprinkler system, herbicides and pesticides can be siphoned through the drinking water system through sprinkler heads. A backflow prevention device prevents water and contaminants from getting through.