DEGREE OF APPLICABLE DEVICE HAZARDa APPLICATIONb STANDARDS High or low Backsiphonage or Air gap ASME A112.1.2 hazard backpressure Air gap fittings for use with High or low Backsiphonage or plumbing ASME A112.1.3 hazard backpressure fixtures, appliances and appurtenances Antisiphon-type fill valves for ASSE 1002, CSA gravity High hazard Backsiphonage only B125.3 closet flush tanks Backflow preventer for Backpressure or carbonated Low hazard backsiphonage ASSE 1022 beverage machines Sizes 1/4″ 3/8″ – Backflow preventer with Backpressure or ASSE 1012, CSA intermediate Low hazard backsiphonage B64.3 atmospheric vents Sizes 1/4″–3/4″ High or low Barometric loop Backsiphonage only (See ) hazard Double trial backflow prevention ASSE 1015, AWWA Backpressure or assembly and double check fire Low hazard C510, CSA B64.5, backsiphonage protection backflow prevention CSA B64.5.1 3/8″–16″ assembly Backpressure or Double detector fire backsiphonage protection Low hazard (Fire sprinkler ASSE 1048 backflow prevention assemblies systems) Sizes 2″–16″ Backpressure or Dual-check-valve-type backflow ASSE 1024, CSA Low hazard backsiphonage preventer B64.6 Sizes 1/4″–1″ Low head backpressure, rated working pressure, Hose connection backflow High or low ASSE 1052, CSA backpressure preventer hazard B64.2.1.1 or backsiphonage Sizes 1/2″–1″ Low head High or low backpressure or ASSE 1011, CSA Hose connection vacuum breaker hazard backsiphonage B64.2, CSA B64.2.1 Sizes 1/2″,3/4″, 1″
DEVICE DEGREE OF HAZARDa APPLICATIONb APPLICABLE STANDARDS Air gap High or low hazard Backsiphonage or backpressure ASME A112.1.2 Air gap fittings for use with plumbing fixtures, appliances and appurtenances High or low hazard Backsiphonage or backpressure ASME A112.1.3 Antisiphon-type fill valves for gravity closet flush tanks High hazard Backsiphonage only ASSE 1002, CSA B125.3 Backflow preventer for carbonated beverage machines Low hazard Backpressure or backsiphonage Sizes 1/4″ – 3/8″ ASSE 1022 Backflow preventer with intermediate atmospheric vents Low hazard Backpressure or backsiphonage Sizes 1/4″–3/4″ ASSE 1012, CSA B64.3 Barometric loop High or low hazard Backsiphonage only (See ) Double backflow prevention assembly and double check fire protection backflow prevention assembly Low hazard Backpressure or backsiphonage 3/8″–16″ ASSE 1015, AWWA C510, CSA B64.5, CSA B64.5.1 Double detector fire protection backflow prevention assemblies Low hazard Backpressure or backsiphonage (Fire sprinkler systems) Sizes 2″–16″ ASSE 1048 Dual-check-valve-type backflow preventer Low hazard Backpressure or backsiphonage Sizes 1/4″–1″ ASSE 1024, CSA B64.6 Hose connection backflow preventer High or low hazard Low head backpressure, rated working pressure, backpressure or backsiphonage Sizes 1/2″–1″ ASSE 1052, CSA B64.2.1.1 Hose connection vacuum breaker High or low hazard Low head backpressure or backsiphonage Sizes 1/2″,3/4″, 1″ ASSE 1011, CSA B64.2, CSA B64.2.1 trial
INTERNATIONAL_PLUMBING_CODE.docx