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ASSE - 1048

Performance Requirements for Double Check Detector Backflow Prevention Assemblies

active, Most Current
Organization: ASSE
Publication Date: 1 May 2021
Status: active
Page Count: 32
scope:

Description

This standard applies to 2 types of assemblies identified as:

a) Double Check Detector Assembly (DCDA).

b) Double Check Detector Assembly Type II (DCDA-II).

The DCDA and DCDA-II assemblies consist of 2 independently acting check valves, internally force loaded to a normally closed position. These assemblies are designed to operate under continuous pressure conditions. The assembly shall include 2 properly located, tightly closing shut-off valves per Section 1.3.2.6; and properly located test cocks per Section 1.3.2.4. The assemblies also include a bypass line which provides a visual or audible indication of system leakage or unauthorized use of water.

Pressure Rating

The maximum working pressure shall be at least 175 psi (1206.6 kPa).

Temperature Range

Assemblies for cold water applications shall be designed for a minimum temperature range of 33°F to 140°F (0.6°C to 60°C).

Assemblies for hot water applications shall be designed for a minimum temperature range of 33.0°F to 180.0°F (0.6°C to 82.2°C).

Document History

1048
May 1, 2021
Performance Requirements for Double Check Detector Backflow Prevention Assemblies
Description This standard applies to 2 types of assemblies identified as: a) Double Check Detector Assembly (DCDA). b) Double Check Detector Assembly Type II (DCDA-II). The DCDA and DCDA-II...
August 1, 2011
Performance Requirements for Double Check Detector Fire Protection Backflow Prevention Assemblies
Description This standard applies to two (2) types of assemblies, identified as: (a) Double Check Detector Assembly (DCDA); and (b) Double Check Detector Assembly Type II (DCDA-II). The DCDA and...
July 24, 2009
Performance Requirements for Double Check Detector Fire Protection Backflow Prevention Assemblies
Description The purpose of a Double Check Detector Fire Protection Backflow Prevention Assembly is to keep polluted water from fire protection systems from flowing into a potable water distribution...
January 1, 2005
Performance Requirements for Double Check Detector Fire Protection Backflow Prevention Assemblies
A description is not available for this item.
September 20, 1999
Performance Requirements for Double Check Detector Fire Protection Backflow Prevention Assemblies
A description is not available for this item.
January 1, 1993
Performance Requirements for Double Check Detector Assembly Backflow Preventer
A description is not available for this item.

References

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