Atlanta Backflow Prevention

Keep Your Water System Safe from Contamination

Backflow describes the unwanted reversal of water flow in a plumbing system, which can lead to significant health risks. When water flows opposite from its intended path, contaminants from various sources can enter the drinking water supply. This contamination can include chemicals, bacteria, and other hazardous substances that compromise the safety of the water.

Preventing backflow is crucial for maintaining clean water supplies in residential and commercial properties. Backflow prevention devices safeguard public health by reducing the likelihood of flow reversal and eliminating potential cross-connections within the water system.

Assured Comfort Heating, Air & Plumbing installs and inspects backflow prevention devices for homeowners and business owners in Atlanta. Our highly trained and fully screened technicians are dedicated professionals who work meticulously to get your water system connected correctly and securely.

If you need a backflow preventer installed or inspected in Atlanta, please contact us at (770) 464-5745 to schedule an appointment.

The Causes and Dangers of Backflow

Backflow occurs when the plumbing system water pressure fluctuates. These fluctuations typically involve a decrease in pressure from the supply line, which can result from various causes, such as a water main break or the sudden demand for water during firefighting. Two primary types of backflow can occur: backpressure and backsiphonage.

Backpressure occurs when the pressure in a system is greater than the pressure in the supply line, causing water to flow in the reverse direction. 

Backsiphonage happens when negative pressure in the supply system creates a vacuum, pulling contaminated water from sources like sewer lines into the clean water supply. This situation can arise from a breakage or other disruptions in the water system.

The risks associated with backflow contamination are severe. If non-potable water containing chemicals, waste, or other dangerous substances enters the drinking water supply, it can lead to illnesses, infections, and even fatalities. Protecting the water supply from these hazards is essential for the health and safety of everyone who relies on it.

Types of Backflow Prevention Valves

Backflow prevention valves prevent the reversal of water flow, keeping contaminants from entering the clean water supply, even when pressure issues occur. 

Several types of backflow prevention devices are available, each suited for different situations and levels of risk:

• Air gaps. These create a physical separation between the potable water supply pipeline and any potential sources of contamination. This simple yet effective method is often used in sinks and other fixtures.
• Atmospheric vacuum breaker assembly. This device uses water flow to close an air inlet valve, preventing backflow.
• Pressure vacuum breaker assembly. When water stops flowing, the check valve in this assembly shuts, and the air inlet valve opens, blocking any reverse flow.
• Double check valve assembly. This device features two spring-loaded check valves and two shut-off valves, which close in the event of backflow, providing reliable protection.
• Reduced pressure zone assembly. This advanced device includes two independently acting check valves and a pressure differential relief valve. If backflow occurs, the check valves close, and the relief valve opens, discharging the contaminated water.

Proper installation of backflow prevention devices is critical to their effectiveness. Specific regulations and guidelines control how and where these devices must be installed, such as their height above the ground and proximity to potential contamination sources. Adhering to these guidelines is essential for compliance and safety.