Every year, waterborne diseases cause an estimated 7.15 million illnesses in the United States alone, according to the CDC.
That’s a wake-up call for anyone responsible for a commercial property’s water supply.
If you think your business is immune, think again.
A single backflow incident can contaminate your building’s water, disrupt operations, and put you on the wrong side of the law.
So, what is a backflow test, and why should you take it seriously?
Below is a guide that explores everything you need to know about a backflow test.
Keep reading-your water safety, compliance, and reputation depend on it.
What Is a Backflow Test?
A backflow test is a specialized procedure in which certified professionals inspect and assess the backflow prevention devices in your plumbing system.
These devices ensure that water only flows in one direction-out to your taps, not back into the main supply.
As a result, it helps protect everyone who uses the water in your building.
During a backflow test, experts verify the proper installation and functionality and inspect for any signs of failure that may allow contaminants to enter your clean water lines.
Why Backflow Happens-and Why You Should Care
Backflow is a dangerous reversal of water flow that occurs due to sudden pressure drops in the supply line.
When pressure drops, hydraulic forces can suck contaminated water backward from sources like irrigation systems, industrial equipment, or even sewage lines into your potable water supply.
For commercial properties, the stakes are higher.
A single backflow event can lead to:
- Operational shutdowns by health departments
- Hefty fines because of violating building safety regulations
- Damage your reputation with tenants, customers, and the community
- Costly repairs such as emergency plumbing system inspections and replacing contaminated fixtures
Luckily, backflow is a preventable crisis.
Ignoring it risks lives, compliance, and your bottom line.
Prevention starts with answering ‘What is a backflow test?’-your annual protection against these disasters.
What Happens During a Backflow Test?
The backflow test involves a comprehensive evaluation of your backflow prevention devices to ensure they’re functioning properly.
During the test, a certified professional will:
Step 1: Prepare and Inspect the Visual Plumbing System Inspection
Before the test starts, the certified tester will let you know that the water will be shut off for a short time.
This is important so you and your tenants can plan.
The tester will inspect your backflow prevention devices, noting the device’s:
- Make
- Model
- Serial number
- Location
They’ll also look for any signs of damage, leaks, or rust in your plumbing system.
This step ensures the device is ready for backflow testing and that there are no visible problems that can affect its function.
Step 2: Set Up Testing Equipment
Next, the tester attaches special gauges and hoses to the device.
These tools measure water pressure and verify that the device can prevent water from flowing backward.
The tester will close certain valves and observe how the pressure changes.
If the pressure drops too much or doesn’t hold steady, it may be a sign of a problem inside the device.
Step 3: Test the Backflow Prevention Devices
After the set-up of equipment, the real testing begins.
This hands-on testing makes sure your backflow prevention devices are functional, keeping your water safe and clean.
The tester will:
Check Valve Pressure
The valves must hold a minimum pressure to prevent contaminated water from flowing backward.
If they don’t, the device fails the test.
Test Relief Valves
Relief valves should open before the system reaches a dangerous pressure difference.
The tester will make sure they open at the right time.
Check Air Ports and Springs
Some devices have air ports and springs that must work properly.
The tester will confirm these parts are functioning as designed.
Step 4: Interpret Results and Make Repairs
If the device passes all tests, you’re good to go.
However, if your device has issues, your qualified plumber will recommend repairs or a full replacement.
Problems like leaks, broken valves, or faulty springs must be fixed immediately to restore water safety.
Step 5: Certification, Documentation, and Compliance
After the test, the plumber will give you a detailed report.
This includes the test results, any repairs made, and a certificate of commercial property compliance.
The documentation is crucial for your records and to show local authorities that you’ve met all building safety regulations.
The Critical Role of Water Safety Testing
A 2025 report by the Environmental Working Group (EWG) found that U.S. tap water contains more than 320 toxic substances.
Water safety testing through backflow prevention can save lives.
When backflow occurs in commercial properties, the contamination spreads throughout the public water distribution system, affecting entire communities.
This is why building safety regulations take backflow prevention so seriously.
Common contaminants that can enter your water supply through backflow include:
- Pesticides and fertilizers
- Heavy metals and toxic substances
- Sewage and wastewater
- Bacteria like E. coli, Salmonella, and Giardia
- Chemical pollutants from industrial processes
Exposure to these contaminants can lead to severe health issues.
This is why thorough, professional water safety testing is non-negotiable.
When to Schedule Your Next Backflow Test
Most local and state building safety regulations require commercial properties to have their backflow prevention devices tested annually.
However, some commercial properties face higher risks and must be tested more often-usually every six months or quarterly.
This includes properties such as:
- Healthcare facilities and hospitals
- Food service establishments
- Manufacturing plants with chemical processes
- Laboratories and research facilities
- Buildings with complex plumbing systems
Don’t wait for problems to appear.
Contaminated water often has no visible color change, taste, or odor.
Hire licensed and trained experts to handle your backflow inspections.
Protect Your Business With Comprehensive Safety Solutions
Your commercial property deserves the highest level of protection.
So, what is a backflow test, and how can it protect your business should be top of mind.
An expert should check your backflow prevention devices to ensure compliance.
Need help with commercial property compliance?
Certizona Fire & Safety has your back.
With 30+ years of expertise, we’ve protected thousands of Arizona businesses from backflow disasters.
Our certified pros ensure you sail through building safety regulations.
Contact us today to request a quote.
Looking for a Fire Protection Service Company?
Trust Certizona Fire & Safety for expert fire protection services. Our experienced team ensures your fire safety systems are up to code and ready to protect your property in any emergency.
Call (623) 227-2092 or request an online quote today!
