What is the function of a check valve in an irrigation system?

A check valve plays a crucial role in irrigation systems by preventing the backflow of water, ensuring that water flows in only one direction. This function is essential for maintaining the efficiency and effectiveness of the irrigation process. By stopping the water from flowing backward, check valves help to protect the system from contamination and maintain consistent pressure where it is needed. This is particularly important in systems that may experience fluctuations in pressure or changes in water direction due to various factors, such as pump operation or changes in elevation. Additionally, by preventing backflow, check valves help to ensure that chemicals, fertilizers, or other contaminants do not enter the main water supply, safeguarding the overall system and the health of the plants being irrigated.