Which type of automatic sprinkler system is usually installed in residential settings?

• A. Deluge System
• B. Dry Pipe System
• C. Deluge With Water Mist
• D. Wet Pipe System

Answer: (D)

In residential fire protection, a wet-pipe system is typically installed. The pipes are filled with water, so when a sprinkler head is heated and opens, water is released immediately to control or knock down the fire. This provides the fastest possible response, which is crucial in homes where fires can spread quickly. The system is also simpler and more cost-effective—fewer components to maintain and less complexity than other types.

Dry-pipe systems hold back water with pressurized air, which adds complexity, higher cost, and potential delays as water must push through the dry portions of the piping before reaching the heads. Deluge systems supply water to all heads and are wasteful for ordinary residential use and are chosen for specialized, high-hazard settings. Deluge with water mist is a more niche, modern approach used in specific occupancies and not typical in standard homes.