www.nobackflow.com/backflow.htm www.abpa.org www.backflow.com www.watts.com www.nobackflow.com/dep-info.htm www.usc.edu/dept/fccchr/ http://water.epa.gov/infrastructure/drinkingwater/pws/crossconnectioncontrol/index.cfm http://www.treeo.ufl.edu/ http://www.leesburgva.gov/home/showdocument?id=1020
WARNING: Installation of a backflow prevention device could cause thermal expansion resulting in potential serious bodily injury and/or property damage. When installing a backflow prevention device, you must consult with a professional plumber to protect against thermal expansion AND ENSURE ALL NECESSARY PRECAUTIONS ARE TAKEN. For more information on thermal expansion, please visit our Thermal Expansion section under Cross Connection Control and Backflow Prevention in this website.
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