How to prevent Backflow
How to Prevent Backflow and Protect Your Water Supply
Backflow is a serious issue that can contaminate your clean water with dirty, hazardous water from your home’s plumbing system. Whether it's caused by a sudden change in pressure or an improperly installed device, backflow poses a real health risk. That’s why preventing backflow should be a top priority for every homeowner or business owner.
In this blog, we’ll break down what backflow is, why it’s dangerous, and most importantly — how to prevent it.
💧 What Is Backflow?
Backflow occurs when water flows in the opposite direction than it’s supposed to. Instead of flowing out of your home through drains and pipes, water reverses direction and contaminates your clean water supply. This can happen when there’s a sudden drop in water pressure — like during a water main break or if a nearby hydrant is used.
Contaminants like pesticides, waste water, or cleaning chemicals can flow back into your drinking water lines, making it unsafe to use or consume.
⚠️ Why Is Backflow Dangerous?
Backflow can introduce a variety of pollutants into your home’s water supply, such as:
Fertilizer and pesticides from lawn irrigation systems
Wastewater from sinks, toilets, or dishwashers
Chlorine or other chemicals from pools and hot tubs
Bacteria and other microorganisms that can cause illness
Because of the potential health risks, local plumbing codes often require homes and businesses to have certified backflow prevention devices — and to test them annually.
✅ How to Prevent Backflow
Preventing backflow isn’t just about compliance — it’s about protecting your family’s health and your community’s water supply. Here are the top ways to prevent backflow:
1. Install a Backflow Prevention Device
A backflow prevention device (like a pressure vacuum breaker or double check valve) is installed on your water system to stop dirty water from re-entering your clean water lines. These devices are especially important for:
Irrigation systems
Pools and spas
Commercial buildings
Homes with multiple water sources
2. Schedule Annual Backflow Testing
Even the best backflow preventers can wear out over time. That’s why most municipalities require yearly testing by a licensed professional to ensure your system is still working properly. A certified plumber will test the device, make any needed repairs, and file the paperwork with your local water authority.
3. Avoid Cross-Connections
A cross-connection is any point where clean and contaminated water can mix. Prevent this by:
Keeping garden hoses out of standing water or buckets
Installing vacuum breakers on hose bibs
Using air gaps (space between a water outlet and the flood level) in sinks and appliances
4. Maintain Your Plumbing System
Old, corroded pipes or poorly installed plumbing can increase the risk of backflow. Have your plumbing inspected regularly to ensure everything is up to code and functioning properly.
5. Work with a Licensed Plumber
Backflow prevention is not a DIY job. It involves precise installation, testing, and compliance with state and local regulations. Hiring a licensed and certified plumber ensures your system is safe, legal, and effective.
👨🔧 Need Backflow Prevention or Testing in Cincinnati?
At United Plumbing, we specialize in backflow prevention installation, annual testing, and repair. Our licensed team ensures your water supply is protected and your system meets all local requirements.
Schedule your backflow service today — and enjoy peace of mind knowing your water is safe.
📞 Call us now or book online for fast, reliable service in Cincinnati, OH.
+1 (283) 210-4896
