How many test cocks does a Double Check Valve Assembly have?

A Double Check Valve Assembly is a critical component in irrigation systems, designed to prevent backflow and protect the potable water supply. This assembly typically includes two check valves installed in series, along with test cocks which are points for connecting a testing device to check the functionality of the valves.

The assembly contains four test cocks: two are located at the inlet and outlet of the assembly, and the other two serve as bypass test cocks. This configuration allows for a thorough assessment of both check valves, ensuring that they are sealing properly and that backflow does not occur. The presence of these test cocks is essential for safety and regulatory compliance, as they facilitate maintenance and troubleshooting.

In contrast, the other responses do not reflect the standard number of test cocks typically found in a Double Check Valve Assembly. Having only two or three test cocks would not allow for the necessary diagnostic checks required for proper system maintenance, which is why the answer is four test cocks.