Backflow devices are installed at a building’s taps and are not testable. Backflow assemblies are installed at a building’s water service connection and are testable and repairable, which is why they are required. Examples of backflow assemblies include a Reduced Pressure Backflow Assembly and a Dual Check Valve Assembly. Examples of a backflow device are a hose-bibb vacuum breaker, atmospheric vacuum breaker, or dual check with atmospheric vent.
