How is backflow prevention achieved?

Backflow prevention is effectively achieved through mechanical means, which typically involves the installation of specific devices designed to stop the reverse flow of water from a contaminated source back into the clean water supply. These devices, which can include backflow preventers such as check valves, air gaps, or reduced pressure zone assemblies, work by creating a physical barrier that prevents the backflow of water, ensuring that potable water remains uncontaminated.

Mechanical backflow prevention systems are critical because they directly address the risk of cross-connections, where unsafe water could potentially mingle with safe drinking water. The effectiveness of these devices relies on proper installation and function, making mechanical methods the primary approach to achieving backflow prevention in irrigation and water supply systems.