Backflow prevention assemblies should be tested annually to ensure they are functioning properly and protecting the potable water system.
The minimum air gap should be at least twice the diameter of the supply pipe but not less than one inch to prevent contamination.
Backsiphonage occurs when negative pressure in the water supply causes contaminants to be drawn into the system.
A backflow prevention assembly prevents contaminated water from flowing back into the potable water supply, ensuring public health and safety.
A Double Check Valve Assembly (DCVA) is used for low to moderate hazard applications and prevents backflow through two independently operating check valves.
A Reduced Pressure Zone (RPZ) assembly provides the highest level of backflow protection by using two check valves and a relief valve.
