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What Causes Backflow in Plumbing?

March 27, 2023

Backflow is a plumbing issue that can be caused by various factors and can cause serious health risks. It happens when water flows in the reverse direction, often due to an obstruction in the system or inadequate pressure. Backflow can lead to contamination of drinking water and other issues if it’s not corrected quickly. Learn more about what causes backflow and how you can prevent it with Fry Plumbing!

What Causes Backflow?

One of the main causes of backflow is a decrease in water pressure. If the pressure suddenly drops, it can create an opening for contaminated water to enter the system and cause backflow. This can be caused by something as simple as someone turning on a sprinkler or other garden hose nearby, or if there’s a clog in the system that’s blocking the flow of water. Another cause of backflow is a break in the plumbing system, like a cracked pipe or a loose fitting. If not addressed quickly, this can lead to unsafe levels of bacteria and other contaminants entering the main line and causing backflow. Backflow can also be caused by improper installation or a lack of maintenance. If the system is not properly installed, it can cause water to flow in the wrong direction and lead to backflow. If the system is not regularly inspected and maintained, it can quickly become clogged with debris or corroded and weakened over time, leading to backflow.

How Can I Prevent Backflow?

To prevent backflow, it’s important to periodically inspect and maintain your plumbing system. Have a professional check for any weak spots or signs of corrosion and make sure all pipes and fittings are in good condition. Additionally, regularly clean any drains to prevent clogs from forming.


You should also install backflow prevention devices whenever possible. These devices detect when water pressure drops and prevent contaminated water from entering the system. There are several types of backflow prevention devices available, so having a professional assess your plumbing needs can ensure you select the best device for your system.

Contact Us With Backflow Prevention Questions

Backflow can be a serious issue that affects both your health and wallet if not addressed quickly. By understanding what causes backflow, inspecting and maintaining your plumbing system regularly, and installing backflow prevention devices whenever possible, you’ll be able to prevent the issue from occurring. If you have any questions or need help with backflow prevention, don’t hesitate to contact us today! We’re always ready to help with all of your plumbing needs.

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