Backflow is a term used to describe the flow of water in the opposite direction of its intended direction. This can occur when the pressure in the water supply system drops, causing water to flow in the opposite direction. This can cause contaminated water to flow back into the clean water supply. Backflow can occur in any plumbing system, but it is most common in homes and businesses that have a cross-connection between the water supply and a source of contamination.

There are two types of backflow: backpressure and backsiphonage.

• Backpressure occurs when the pressure in the water supply system is greater than the pressure in the plumbing system. This can cause water to flow back into the clean water supply.
• Backsiphonage occurs when there is a sudden drop in pressure in the water supply system. This can cause water to be siphoned back into the clean water supply.

What Is a Cross-Connection?

A cross-connection is a connection between the water supply and a source of contamination. This can occur when a plumbing system is not properly installed or maintained. A cross-connection can also occur when a hose is left in a bucket of soapy water or when a hose is submerged in a swimming pool or hot tub. A cross-connection can also occur when a plumbing system is connected to a non-potable water supply, such as a well or a cistern.

What Is Backflow Prevention?

Backflow prevention is the process of preventing water from flowing in the opposite direction of its intended direction. This can be done by installing a backflow prevention device, such as a backflow preventer or a check valve. A backflow preventer is a device that is installed in the plumbing system to prevent water from flowing in the opposite direction. A check valve is a device that is installed in the plumbing system to prevent water from flowing in the opposite direction.

What Is a Backflow Preventer?

A backflow preventer is a device that is installed in the plumbing system to prevent water from flowing in the opposite direction. A backflow preventer is typically installed at the point where the water supply enters the building. A backflow preventer is designed to allow water to flow in one direction, but not in the opposite direction. A backflow preventer is typically made of brass or bronze and is installed in a vertical position. A backflow preventer is typically installed in a valve box or a meter pit.

What Is a Check Valve?

A check valve is a device that is installed in the plumbing system to prevent water from flowing in the opposite direction. A check valve is typically installed at the point where the water supply enters the building. A check valve is designed to allow water to flow in one direction, but not in the opposite direction. A check valve is typically made of brass or bronze and is installed in a vertical position. A check valve is typically installed in a valve box or a meter pit.

What Is Backflow Testing?

Backflow testing is the process of testing a backflow preventer to ensure that it is working properly. Backflow testing is typically performed by a licensed plumber or a certified backflow tester. Backflow testing is typically performed on an annual basis, but it may be required more frequently in some areas. Backflow testing is typically performed by a licensed plumber or a certified backflow tester. Backflow testing is typically performed on an annual basis, but it may be required more frequently in some areas.