What is the minimum safe residual water pressure for pump safety?

The minimum safe residual water pressure for pump safety is considered to be 20 psi. Maintaining this pressure is essential to ensure that the pump operates efficiently and effectively without sustaining damage. A residual pressure of 20 psi helps to keep the pump not only functioning properly but also appropriately primed, which is crucial to prevent issues like cavitation. Cavitation can occur when the pressure drops too low, leading to vapor formation and potential damage to the pump. By adhering to this minimum pressure threshold, operators can safeguard the pump and the entire water delivery system, ensuring reliable service during critical operations. This knowledge is vital for any mobile pump operator, emphasizing the importance of monitoring and maintaining appropriate pressure levels during operation.