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Schools If Ludlow you would like your backflow tester training school listed on this page, please send for School Survey Form. Send Huntington your mailing address Paoli to Les O Brien at UF/TREEO. County or Walpole State Albany STATE OF NEW YORK Cetified. County or State Albany STATE OF NEW YORK DEPARTMENT OF HEALTH BUREAU OF WATER SUPPLY PROTECTION Cetified Backflow Prevention Device Testers E. Gurnee Blair, Jr. Sprinkler Systems and Backflow Prevention Backflow preventers are installed in the irrigation system to protect our drinking water, save lives and prevent illness. Sprinkler supplies shipped fast! Sprinkler.