What is a vacuum breaker?

A vacuum breaker is a device that prevents backflow in a plumbing system by allowing air to enter the water supply line if there is a drop in pressure. This helps to protect against contamination of the water supply from outside sources such as garden hoses or irrigation systems.

Vacuum breakers are commonly used in outdoor faucets, hose bibs, and irrigation systems to prevent the backflow of contaminated water into the main water supply. They are also used in commercial and industrial settings to protect against the backflow of chemicals or other harmful substances.

There are two main types of vacuum breakers: atmospheric vacuum breakers and pressure vacuum breakers. Atmospheric vacuum breakers rely on gravity to close off the valve and prevent backflow, while pressure vacuum breakers use a spring-loaded mechanism to create a barrier against backflow.

It is important to regularly inspect and maintain vacuum breakers to ensure they are functioning properly and providing adequate protection against backflow. Failure to do so can result in contamination of the water supply and potential health risks.