A RPZ Valve, also known as a Reduced Pressure Zone Valve Assembly, is used to protect against back siphonage and back pressure, situations which can cause contaminated water from reaching the public potable water supply.

They are called a number of names including backflow valve, backwater valve as well as backflow preventer, but no matter what name they go by, their purpose is to guard against backflow, the reversal of water in a water system.  RPZ valves are the highest protection assembly available, the industry standard used for commercial properties, apartment buildings and condominiums.

City Backflow Testing is certified in the use of RPZ Valves as well as all other backflow preventers and also certified for annual