When a line is being charged with water, what may relay apparatus discharge?

When a line is being charged with water, relaying apparatus may discharge air through a bleeder valve. This is crucial for maintaining the integrity of the water supply system.

As water is introduced into the line, it needs to replace any air that may be trapped in the system. The bleeder valve allows this air to escape safely, preventing issues such as air pockets that could hinder water flow or cause fluctuations in pressure. Properly bleeding air out of the system ensures that water flows smoothly and at the correct pressure, which is essential for effective firefighting operations.

Bleeder valves serve as an important safety feature because they help to maintain an efficient hydraulic flow and prevent potential damages to the apparatus or the firefighting system itself. Hence, the discharge of air through the bleeder valve is a necessary action when charging a water line, ensuring the apparatus can function optimally during fire suppression activities.