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

A check valve serves a critical role in an irrigation system by allowing the flow of water in one direction only. This is vital for preventing backflow, which can lead to contamination of the water supply and ensure that the water delivered to the irrigation system does not flow back into the source. By maintaining a unidirectional flow, the check valve helps keep the system efficient and protects the integrity of the water being used for irrigation.

The design of the check valve incorporates a mechanism that closes if the water attempts to flow in the reverse direction, thereby blocking potential backflow and maintaining the pressure needed for effective irrigation. This functionality is essential for protecting drinking water supplies and ensuring the proper operation and longevity of the irrigation system.