IREM Certified Property Manager (CPM) Practice Test 2025 - Free CPM Practice Questions and Study Guide

A dry pipe sprinkler system is specifically designed to maintain the pipes filled with air rather than water until a fire occurs. This design prevents water from being stored in the pipes, reducing the risk of freezing and subsequent pipe ruptures in environments where temperatures may drop to freezing levels. When a fire is detected, the activation of a heat-sensitive device triggers the release of air from the pipes, allowing the system to fill with water and discharge it onto the fire. This feature makes dry pipe systems particularly suitable for unheated areas such as warehouse spaces or unconditioned attics.

In contrast, wet pipe sprinkler systems keep water constantly in the pipes, providing immediate access to water upon activation, which is effective in most indoor environments. Pre-action systems combine elements of both wet and dry pipe systems, requiring an initial detection of fire to fill the pipes with water before discharge. Deluge sprinkler systems are designed with open sprinkler heads and can release large quantities of water simultaneously, making them ideal for high-hazard areas, but they also necessitate an immediate water flow upon activation. Thus, the distinguishing feature of a dry pipe system is its ability to remain empty of water until a fire response is initiated, making it the correct choice.