What is the primary function of intake pressure relief valves during relay pumping operation?

The primary function of intake pressure relief valves during relay pumping operations is to reduce the potential for damage to the pump or hoselines. These valves serve as a safety mechanism, allowing excess pressure to be released when the pressure in the system exceeds a predetermined limit. This is particularly important in relay pumping, where multiple pump units are used to transport water over long distances. If excessive pressure builds up, it can lead to equipment failure, hose bursts, or other dangerous situations.

By allowing the excess pressure to vent, intake pressure relief valves help maintain the integrity of the pumping system and protect the equipment involved. This function is crucial for ensuring safe operations and preventing costly repairs or hazardous incidents. Thus, the correct answer reflects the role of these valves in safeguarding the equipment during relay pumping operations.