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Home Sprinkler Systems: Backflow Prevention Devices

Backflow Prevention Devices protect thedrinking water system from contami-nation due to Backflow of non-potable(contaminated) water into the potable (fitfor drinking) water supply. Backflow is oftwo types, back-siphonage and drop in pressure in the main citywater line can result in back-siphonagebackflow of fertilizers, pesticides,manures and other contaminantsthrough Sprinkler heads and theirrigation piping system into the potablewater supply. This same contaminationmay occur through a hose-attachedsprinkler, spray nozzle or pesticidesprayer. This presents a serious threat topublic health. This drop in pressure canresult from a break in the line or bylowered mainline pressure due to highwater withdrawal, as may occur duringfire fighting operations.

the reduced pressure principle backflow assembly (RP device) to ensure safety. Winterizing Systems Backflow prevention devices will be damaged by freezing during the winter unless drained of all water. See 4.719, Home ... Home Sprinkler Systems: Backflow Prevention Devices Author:

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