What is the main purpose of a blow-off valve?

The main purpose of a blow-off valve is to expel stagnant water or sediment from the piping system. This function is crucial for maintaining the overall quality of water within the distribution system. Stagnant water can lead to contamination and the growth of harmful bacteria, while sediment accumulation can cause blockages and reduced flow efficiency. The blow-off valve allows operators to effectively purge these unwanted elements, ensuring a cleaner and more reliable water supply.

In contrast, regulating water flow, controlling pressure, or filtering impurities are not primary functions of the blow-off valve. While those tasks are essential for a well-functioning distribution system, they are typically managed by other components such as flow regulators, pressure relief valves, and filtration systems. The blow-off valve specifically targets the issue of stagnant water and sediment, making it an important feature for water quality maintenance.