Red Seal Sprinkler Fitter Practice Exam 2025 – Complete Prep Guide

Question: 1 / 400

What does a dry pipe valve do in a sprinkler system?

Helps reduce water pressure

Maintains air pressure in the pipes

Increases the flow of water to the sprinkler heads

Prevents water from flowing until needed

A dry pipe valve is a crucial component in a sprinkler system, especially in environments where the risk of freezing is a concern. Its primary function is to prevent water from being stored in the pipes; instead, it keeps the pipes filled with air or nitrogen, maintaining a dry condition until a fire is detected. When a fire occurs, the heat activates the sprinkler heads, the dry pipe valve opens, and water flows into the system to extinguish the fire.

This mechanism is vital for ensuring that water only enters the system when necessary, thereby preventing unwanted water damage in unoccupied spaces where the sprinkler system is not needed until an emergency arises. The ability to hold back water until it is truly required makes the dry pipe valve an essential safety feature, effectively balancing functionality with protection against potential frost-related issues.

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