During relay pumping operations, what is the purpose of the intake pressure relief valves?

The primary purpose of intake pressure relief valves during relay pumping operations is to reduce potential damage to the pump or hoselines. When multiple pumps are in operation, pressure surges can occur, which may lead to excessive pressure within the system. If the pressure exceeds safe limits, it can cause significant damage to the pump components or the hoselines, which could result in failures or leaks. The intake pressure relief valves act as a safeguard to release excess pressure, thereby protecting the integrity of the entire pumping system.

By managing the pressure effectively, these valves ensure that the pump operates within its designed parameters, which prolongs the life of the equipment and maintains operational effectiveness during fire fighting efforts. This protective mechanism is essential, especially in relay operations where multiple connected pumps may introduce variable pressures due to changes in flow or operation.