What is the function of a pressure relief valve on a water supply vehicle?

The function of a pressure relief valve on a water supply vehicle is to prevent over-pressurization of the system. This is a crucial safety feature designed to protect various components of the water supply system from damage caused by excessive pressure. If the water pressure exceeds a certain threshold, the pressure relief valve opens to release water, thus reducing the pressure back to a safe level. This helps ensure the integrity of hoses, fittings, and other parts of the water system, preventing potential leaks or ruptures that could occur due to high pressure.

In the context of a mobile water supply operation, maintaining proper pressure is vital for effective and safe water delivery during firefighting operations. A malfunctioning or absent pressure relief valve could lead to system failures and compromise the efficiency of water deployment.