Which is not a feature of a double check valve assembly?

A double check valve assembly is used primarily to prevent backflow in water supply systems. It is characterized by several essential components, each serving a specific purpose to ensure its functionality and reliability in protecting the water supply.

The feature that distinguishes a double check valve assembly is the inclusion of two independent check valves. This design enhances the device's effectiveness in preventing back siphonage and back pressure. Additionally, the assembly incorporates two shutoff valves, which are necessary to isolate the assembly from the system for maintenance or inspection.

The strainer serves an important function by filtering out debris that could obstruct the flow through the valves or compromise their operation. This feature is crucial for maintaining efficiency and protecting the integrity of the system. Moreover, double check valve assemblies typically include test cocks, which are necessary for conducting field tests to verify the proper functioning of the assembly and to check for any leaks or defects.

The provision for discharging water is not a typical feature of a double check valve assembly. This aspect generally refers to a mechanism designed for relieving pressure or expelling water in specific situations but is not integral to the primary functions of the double check assembly itself. Hence, the reason this choice is not associated with a double check valve assembly is that it does not fulfill the