Backflow Prevention Questions With 100% Correct Answers.

Air gap separation - ANSI A112.1, Severe High, High or Low Hazard, Backsiphonage/Backpressure. Only absolute means of preventing backflow. Pipe applied Atmospheric Type Vacuum Breaker - ASSE 1001, High or Low Hazard, Backsiphonage only, NO continuous pressure, No downstream valve Anti-siphon Fill Valve, W.C. - ASSE 1002, High or Low Hazard, Backsiphonage only Hose Connection Vacuum Breaker - ASSE 1011, High or Low Hazard, Backsiphonage, Low Head Backpressure, No continuous pressure Backflow preventer with Intermediate Atmospheric Vent - ASSE 1012, Low Hazard, Low Pressure, Backsiphonage/Backpressure, Low pressure Boilers or cooling towers, No Additives. Reduced Pressure Principle Backflow Preventer - ASSE 1013, High or Low Hazard, Backsiphonage/Backpressure, Main Supply lines, commercial or chemically treated boilers or chillers, Main Hospital lines and equipment, tanks with submerged inlets. Reduced Pressure Principle Detector Check Assembly - ASSE 1047, High or Low Hazard Fire sprinkler systems, Installed on a fire protection system Containing Any Additive or anti-freeze. Double Check Backflow Prevention Assembly - ASSE 1015, Low Hazard Only, would not present a hazard to health, Main Supply lines, cookers, tanks or vats containing non-toxic substances. Double Check Detector Check Assembly - ASSE 1048, Low Hazard Only Fire sprinkler systems, fire protection system that contains only public water, no booster pump, storage, or auxiliary water, No Chemical and/or non-toxic fire protection systemVacuum Breaker Wall Hydrant, Freeze-resistant, Automatic Draining Type - ASSE 1019, High or Low Hazard, Backsiphonage Low Head Backpressure, No continuous pressure, negligible backpressure in the 1.0 psi to 2.0 psi range, no continuous pressure over 12 hrs. Wall Hydrant Hose Bib. Pressure Vacuum Breaker Assembly - ASSE 1020, High or Low Hazard, Backsiphonage Only, continuous pressure is OK because the air inlet and check valve are spring-loaded, Irrigation systems, plating tanks, livestock watering systems, supply to submerged inlets.