Backflow is prevented through the use of backflow prevention devices. These devices are designed to ensure that water flows in one direction and does not reverse back into the main water supply. The most common type of backflow prevention device is the backflow preventer, which is installed at key points in the plumbing system.
There are different types of backflow preventers, such as the pressure vacuum breaker (PVB), double check valve assembly (DCVA), and reduced pressure zone device (RPZ). These devices create a physical barrier that prevents water from flowing backward and contaminating the clean water supply.
Regular maintenance and testing of backflow prevention devices are essential to ensure their proper functioning. Certified plumbers or backflow specialists should conduct periodic inspections to verify that the devices are working correctly and are in compliance with local regulations.
By implementing backflow prevention measures, we can safeguard public health and maintain the integrity of our water supply systems.