In a fire pump system, which type of pipe is acceptable for the pressure sensing lines?

In a fire pump system, the use of brass is acceptable for pressure sensing lines due to its excellent corrosion resistance and ability to withstand high pressures. Brass is durable and can handle the environmental conditions typically found in fire protection systems, ensuring reliable and accurate pressure readings.

Unlike plastic, which may not be suitable for high-pressure applications or extreme temperatures, brass maintains its integrity over time. Rigid copper is also a durable choice, but is less commonly used for pressure sensing due to potential issues with corrosion in certain environments. Steel, while strong, may not provide the necessary corrosion resistance unless properly treated or galvanized. The attributes of brass make it the best choice among the given materials for use in pressure sensing lines in fire pump systems.