This standard applies to two types of backflow preventionassemblies, identified as:
(a) Double Check Backflow Prevention Assembly (DC); and
(b) Double Check Fire Protection Backflow Prevention Assembly(DCF).
These assemblies consist of two (2) independently acting checkvalves, internally force loaded to a normally closed position, two(2) properly located, tightly closing shut-off valves, per Section188.8.131.52, and properly located test cocks, per Section 184.108.40.206.These assemblies are designed and constructed to operate underintermittent or continuous pressure conditions.
This standard also applies to Manifold Double Check BackflowPrevention Assemblies consisting of two (2) or more complete DoubleCheck Backflow Prevention Assemblies in parallel. The assemblies donot need to be of the same pipe size. The manifold size shall beidentified by the single inlet and outlet of the manifold assembly.Manifold Double Check Backflow Prevention Assemblies shall includeline-sized shut-off valves on each inlet and outlet of theassemblies making up the manifold.
The assemblies shall be designed for a minimum temperature rangeof 33.0Â°F to 140.0Â°F (0.6Â°C to 60.0Â°C)
- Product Code: ASSE
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