What purpose does a check valve serve in a water system?

A check valve serves a critical function in a water system by preventing backflow. Backflow can occur when a pump stops, leading to the potential for water to flow in the opposite direction, which can cause contamination or damage to the system. The check valve’s primary role is to allow fluid to flow through it in one direction while blocking flow in the opposite direction. This is essential in maintaining the integrity of the water supply and ensuring that water does not return to a section of the system where it could introduce contaminants or disrupt the flow process.

Utilizing a check valve is particularly important in systems where the pressure may fluctuate or where water might be used and then halted for periods. This design helps to promote a reliable and safe water system operation, ensuring that once water is pushed through the system, it cannot inadvertently escape back through the same route.