Which of the following is NOT a common component of a dry pipe sprinkler system?

In a dry pipe sprinkler system, the primary purpose is to prevent water from being present in the piping until a fire is detected. This system relies on pressurized air or nitrogen to keep the sprinkler pipes dry.

The control valve, dry pipe valve, and pressure regulator are all essential components of a dry pipe system. The control valve is used to operate the system and isolate it from the water supply when not in use. The dry pipe valve acts as a critical component that holds back the water supply until the system is activated by a fire, at which point it releases water into the pipes. A pressure regulator is also important as it helps maintain the correct pressure within the piping system to ensure proper operation.

On the other hand, a dry pipe system does not typically contain a direct water supply within the piping. Instead, it is connected to a water supply that remains isolated from the system until needed. Therefore, asserting that a water supply is a common component of a dry pipe sprinkler system is inaccurate, as there is no water in the piping until the dry pipe valve opens in response to a fire condition.