Page 70 - 2018_IPC

WATER SUPPLY AND DISTRIBUTION

TABLE 608.1
APPLICATION OF BACKFLOW PREVENTERS
DEVICE DEGREE OF HAZARD a APPLICATION b APPLICABLE STANDARDS
Backflow prevention assemblies:
Double check backflow prevention Backpressure or backsiphonage ASSE 1015, AWWA C510,
assembly and double check fire Low hazard Sizes / ″–16″ CSA B64.5, CSA B64.5.1
3
protection backflow prevention assembly 8
Double check detector fire protection Low hazard Backpressure or backsiphonage ASSE 1048
backflow prevention assemblies Sizes 2″–16″
1
Pressure vacuum breaker assembly High or low hazard Backsiphonage only Sizes / ″–2″ ASSE 1020, CSA B64.1.2
2
Reduced pressure principle backflow Backpressure or backsiphonage ASSE 1013, AWWA C511,
prevention assembly and reduced pressure High or low hazard Sizes / ″–16″ CSA B64.4, CSA B64.4.1
3
principle fire protection backflow assembly 8
Reduced pressure detector fire protection High or low hazard Backsiphonage or backpressure ASSE 1047
backflow prevention assemblies (Fire sprinkler systems)
Backsiphonage only
Spill-resistant vacuum breaker assembly High or low hazard ASSE 1056; CSA B64.1.3
Sizes / ″–2″
1
4
Backflow preventer plumbing devices:
Antisiphon-type fill valves for gravity High hazard Backsiphonage only ASSE 1002/ASME A112.1002/
water closet flush tanks CSA B125.12, CSA B125.3
Backflow preventer for carbonated Low hazard Backpressure or backsiphonage ASSE 1022
3
1
beverage machines Sizes / ″– / ″
4
8
Backflow preventer with intermediate Low hazard Backpressure or backsiphonage ASSE 1012, CSA B64.3
1
3
atmospheric vents Sizes / ″– / ″
4
4
Backpressure or backsiphonage
Dual-check-valve-type backflow preventer Low hazard 1 ASSE 1024, CSA B64.6
Sizes / ″–1″
4
Low head backpressure, rated
Hose connection backflow preventer High or low hazard working pressure, backpressure ASME A112.21.3, ASSE 1052,
CSA B64.2.1.1
1
or backsiphonage Sizes / ″–1″
2
Low head backpressure or
Hose connection vacuum breaker High or low hazard backsiphonage ASME A112.21.3, ASSE 1011,
CSA B64.2, CSA B64.2.1
3
1
Sizes / ″, / ″, 1″
4
2
Low head backpressure and
Laboratory faucet backflow preventer High or low hazard ASSE 1035, CSA B64.7
backsiphonage
Backsiphonage only
Pipe-applied atmospheric-type vacuum breaker High or low hazard 1 ASSE 1001, CSA B64.1.1
Sizes / ″– 4″
4
Low head backpressure or
Vacuum breaker wall hydrants, High or low hazard backsiphonage ASME A112.21.3, ASSE 1019,
frost-resistant, automatic-draining type 3 CSA B64.2.2
Sizes / ″, 1″
4
Other means or methods:
Air gap High or low hazard Backsiphonage or backpressure ASME A112.1.2
Air gap fittings for use with plumbing High or low hazard Backsiphonage or backpressure ASME A112.1.3
fixtures, appliances and appurtenances
Barometric loop High or low hazard Backsiphonage only (See Section 608.14.4)
For SI: 1 inch = 25.4 mm.
a. Low hazard—See Pollution (Section 202).
High hazard—See Contamination (Section 202).
b. See Backpressure, low head (Section 202).
See Backsiphonage (Section 202).

2018 INTERNATIONAL PLUMBING CODE ® 53
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