What is the typical capacity range for a jockey pump in a fire system?

The typical capacity range for a jockey pump in a fire system is generally recognized as being 2 to 5 percent of the fire pump capacity. This capacity range is designed to handle small fluctuations in system pressure and address minor leaks or system demand without the need for the larger fire pump to activate. Jockey pumps serve an essential role in maintaining system pressure, ensuring that the fire pump operates efficiently and only kicks in when there is a more significant demand or when the water supply has been compromised.

Understanding the function and capacity of a jockey pump is crucial for ensuring effective fire protection system design, as it helps maintain readiness without unnecessary wear on the fire pump itself. By keeping the jockey pump capacity in this range, designers ensure that it can adequately manage pressure without overburdening the system or causing instability in conditions that would lead the fire pump to cycle frequently.