Backflow is a term in plumbing for an unwanted flow of water in the reverse direction. [1] It can be a serious health risk for the contamination of potable water supplies with foul water.

Learn how backflow preventers work, why they matter, and the types used to protect water systems from contamination in residential and commercial buildings.

Apr 11, 2025 · Backflow occurs when water flows backward through your plumbing, potentially contaminating your home’s drinking supply. Your plumbing system is designed to deliver clean …

Feb 19, 2025 · Backflow occurs when the normal flow of water in a plumbing system is reversed, allowing non-potable (contaminated) water to enter the clean water supply. This can introduce …

Jan 29, 2025 · Backflow is the undesirable reversal of the flow of water or other substances from a private plumbing system into the public water supply. This can occur in any system where …

Backflow occurs when water flows in the opposite direction through your plumbing, potentially contaminating clean water with dirty water. Backflow can cause serious health and safety …

Without proper backflow protection, disease and other pollution and contamination will be transmitted to occupants and no one will be safe. This chapter covers identification of …

When these situations occur, conditions are present that can allow the backflow of pollutants or contaminants into the water system and threaten the purity of our drinking water system. What …

Backflow is the undesirable reversal of this flow of water and undesirable substances from the non-potable source to the potable source. Why is Backflow Testing Important? Backflow …

But what exactly is backflow? Backflow is the unwanted reverse flow of fluids, gases, or other substances in a plumbing system due to a backpressure or a backsiphonage situation.