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Backflow Education

A Georgia Backflow Tester is focused on educating the community about what backflow is, what causes backflow, how backflow affects you, and the different types of backflow preventers.


Backflow - The reversed flow of a non-potable source into a potable system, because a pressure differential exists where the pressure on the non-potable side is greater than the pressure on the potable side.

Backflow Prevention Assembly - A mechanical device used to prevent the backward flow of contaminants or pollutants into a potable water distribution system.

Contaminant - any physcial, chemical, biological, or radiological substance or matter in water. Some mantaminants my be harmful if consumed at certain levels of drinking water.

Cross-Connection - Any arrangement of pipes, fittings, fixtures, or devices that directly or indirectly connects a non-potable water system to a potable water system.

Cross-Connection Control - The use of assemblies, devices, methods, and procedures to prevent contamination or pollution of a potable water supply through cross-connections.

Potable Water - Water that is safe for human consumption (meets the Safe Drinking Water Standards) and is aesthetically pleasing.


Frequently Asked Questions about Backflow Prevention

What is backflow? - Water that has left the main water supply, then entered into your home or business to intermingle with numerous contaminents is no longer safe for drinking. Once this water is pulled back into the pipes in the wrong direction, it has the opportunity to mix with the clean drinking water, thus contaminating the entire town's water supply.

What causes backflow? - When there is a sudden drop in water pressure in your area (usually during the elimination of a fire, or concurrent use of large amounts of water by too many people at one time) the drop in pressure is what then pulls water that has already been expelled back into the main water supply.

How does backflow affect me? - Out of sight, all water pipes entering your home, the restaurant down the street, and your local hospital, are all connected to the same water supply. In your residence or business, any mechanically-controlled use of water (ie: lawn irrigation, fire sprinkler system, pop machines, pedicure bowls, etc.) a backflow preventer is a necessary accessory to your plumbing system. A "backflow preventer" is just what it sounds like. Once water pressure drops, the backflow preventer seals shut, not allowing any water to flow backwards in the wrong direction.The EPA mandates that all backflow preventers be tested and certified once, sometimes twice per year, depending on the geographical location of the backflow preventer. If a water customer chooses not to meet this requirement, that customer will eventually be faced with the termination of their water service until they are able to show proof that their device has been properly tested and maintained. This annual or semi-annual testing is what ensures the safety of your drinking water.



Types of Backflow Preventers

Double Check Valve Assembly (DCV) - Seen on: Low hazard domestic water lines-









Reduced Pressure Principle Assembly (RP) - Seen on: High hazard systems

such as-lawn irrigation, boiler makeup, chiller makeup, and domestic water lines. -







Double Check Valve Assembly (DCDA) - Seen on: Low Hazard Fire Protection System -

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