Double check valve (DCV) assembly definition
Double check valve (DCV) assembly means two, single, independently-acting check valves, including tightly closing shut-off valves located at each end of the assembly and suitable connections for testing the water-tightness of each check-valve.
Double check valve (DCV) assembly means an assembly composed of two independently operating, approved check valves, including tightly closing shut-off valves attached on each end of the assembly and fitted with properly located test cocks for testing that each check valve is watertight. DCV assemblies shall be installed to protect against a nonhealth hazard (e.g., a pollutant).