A pressure vacuum breaker is most commonly used on sprinkler and irrigation systems to prevent backflow. It works by allowing water to flow in only one direction—out toward your sprinkler system—while automatically blocking reverse flow if water pressure drops unexpectedly. This is critical during events like a water main break or sudden pressure loss, which can otherwise pull contaminated water back into your home’s potable water supply.
Inside the PVB are internal valves and an air inlet that react instantly to pressure changes. When pressure is normal, the system operates as usual. If pressure drops, the device opens to break the vacuum and closes off the supply, preventing fertilizers, chemicals, or bacteria from entering your drinking water. In Fredericksburg and throughout the Texas Hill Country, pressure vacuum breakers are often required by code for irrigation systems and must be installed and maintained correctly to function as intended.
At 72 Degrees Texas, our plumbers specialize in the professional installation and maintenance of pressure vacuum breakers, ensuring your system meets local requirements and continues to protect your water supply reliably over time.
