What is a characteristic of relay pumping?

Relay pumping is a method used in fire suppression where water is moved from one location to another, often over considerable distances, to ensure an adequate supply reaches the fire. The correct characteristic of relay pumping is the use of the open or constant pressure method, which involves maintaining a steady pressure in the system to ensure that water can flow effectively through all connections and hoses involved.

This method allows for efficient transportation of water, particularly when the initial pump source is far from the fire. By ensuring constant pressure throughout the relay system, fire apparatus operators can effectively manage the flow of water, preventing interruptions that could potentially hinder firefighting efforts. The use of constant pressure is essential in relay pumping because it helps ensure an uninterrupted and reliable supply of water to the firefighting teams working on the front lines.

In contrast, multiple independent sources, single source connections, and the concept of high-pressure water flow do not fully capture the fundamental principle at the heart of relay pumping, which is based on maintaining consistent pressure during water transfer.