When might flow control valves be necessary in a private fire service system?

Flow control valves are crucial in private fire service systems primarily for managing pressure within the system. Over-pressurization can lead to significant damage to the piping and connected components, potentially compromising the system's integrity and effectiveness. By employing flow control valves, the system can maintain optimal pressure levels, ensuring there is neither too much pressure, which could rupture pipes, nor too little, which could hinder the system's ability to deliver adequate water during a fire emergency. This pressure management is particularly vital in systems that experience varying flow demands or where pressure fluctuations can occur due to changes in water supply or usage.

In contrast, while a lack of water supply, minimal fire hazards, or areas with frequent droughts may present challenges for a fire service system, they do not directly relate to the necessity of flow control valves. Each of those conditions pertains more to overall system design and water availability, rather than the specific function of controlling pressure effectively within an operational fire service system.