Chicago Area Backflow Preventer Testing Residential & Commercial

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Larry’s Plumbing is certified to test your backflow preventer and also perform your annual test and certification.

Backflow Prevention in Franklin Park, IL

Clean water is something you count on every time you turn on a faucet. A backflow preventer keeps that water safe by stopping contaminated water from flowing back into your clean supply. At Larry's Plumbing Co., we help homes and businesses in Franklin Park, IL protect their drinking water with expert backflow prevention services. As a Veteran Owned, Women, and Minority Owned business, we take pride in quality workmanship and honest service, available around the clock.


What Is a Backflow Preventer and How Does a Backflow Prevention System Work?

A backflow preventer is a device installed on your plumbing that allows water to flow in one direction only. Under normal conditions, water moves from the city main into your property. But sudden pressure changes can reverse that flow, pulling dirty water, chemicals, or waste back into your clean lines. That reversal is called backflow.


A backflow prevention system uses check valves and air gaps to block this from happening. When pressure drops or reverses, the backflow prevention valve closes automatically and seals off the contaminated water.

Signs You Need Backflow Prevention Inspection or Testing

Backflow issues are not always obvious, so watch for these warning signs:



  • Discolored, cloudy, or rusty water coming from your taps
  • A sulfur, metallic, or unusual smell in your water
  • Sputtering faucets or inconsistent water pressure
  • Visible sediment or particles in your water
  • Slow drainage combined with strange odors
An outdoor valve assembly & exposed pipes showing backflow prevention services in Franklin Park, IL

Backflow Preventer Installation and Replacement Services

Proper backflow preventer installation protects your property and keeps you compliant with local codes. Our licensed technicians handle backflow prevention device installation for new construction, remodels, and upgrades. We size and position each unit correctly, then test it to confirm it works as intended.


If your existing device is old, corroded, or failing tests, we offer prompt replacement. We help you choose the right backflow prevention valve for your specific setup and budget.


Irrigation and Sprinkler Backflow Preventer Solutions

Lawn irrigation systems are a common source of contamination. Without proper protection, fertilizers, pesticides, and standing water can flow backward into your drinking supply. We install and service irrigation backflow preventers across Franklin Park, IL, ensuring your system meets code and functions properly year-round. Ask about our seasonal maintenance packages to keep everything in top shape.


Backflow Prevention Inspection, Testing, and Compliance

Most municipalities require annual testing of backflow devices. Our certified testers perform thorough backflow prevention inspection and testing, then document the results for your records and local authorities. We handle the paperwork and submit reports, so you stay in full compliance.


Backflow Preventer Maintenance and Repair Services

Regular backflow preventer maintenance extends the life of your device and keeps it functioning when you need it most. During each visit, we clean components, check seals, and confirm the valve responds correctly to pressure changes. When issues arise, our repair service gets your system back on track fast. We stock common parts on our trucks, so most repairs are completed in a single visit, and our 24-hour service ensures we're ready when emergencies strike.


Commercial Backflow Prevention Services

Restaurants, medical facilities, factories, and office buildings face strict backflow requirements. We work with commercial property owners and managers throughout Franklin Park, IL to install, test, and maintain reliable backflow prevention systems. Our team understands local codes and helps you avoid costly interruptions to your operations. Reach out to discuss a commercial service plan tailored to your building.


Why Choose Larry's Plumbing for Backflow Prevention Services

  • Veteran Owned, Women, and Minority Owned business rooted in the community
  • Licensed, certified, and experienced backflow technicians
  • 24-hour service for emergencies and urgent testing
  • Honest, upfront pricing with no surprises
  • Complete documentation and compliance support
  • A commitment to quality workmanship on every job


Call Our Team Today

Larry's Plumbing Co. delivers dependable backflow prevention services that protect your health, your property, and your peace of mind. Call Larry's Plumbing Co. today or schedule your appointment online to keep your water clean and your system compliant in Franklin Park, IL.


Frequently Asked Questions

  • How Often Should a Backflow Preventer Be Tested?

    Most local codes require annual testing, though some commercial properties may need more frequent inspections. We track your schedule and send reminders when testing is due.

  • Are Backflow Preventers Required by Local Regulations?

    Yes. Franklin Park and most Illinois municipalities require backflow devices on many properties, along with annual testing and reporting. We ensure full compliance.

  • What Types of Properties Need a Backflow Prevention Device?

    Homes with irrigation systems, pools, or boilers, as well as most commercial and industrial buildings, typically require one. Our team can assess your property if you are unsure.

  • What Happens If My Backflow Preventer Fails an Inspection?

    A failed test means the device is not sealing correctly. We diagnose the issue, repair or replace the unit, and retest it to confirm it meets code.

  • Can a Backflow Preventer Protect Irrigation and Sprinkler Systems?

    Yes. An irrigation backflow preventer stops fertilizers and chemicals from entering your drinking water. We install and service these devices for sprinkler systems of every size.

Almost all villages and towns in the Chicago area, require you to have a backflow preventer test

completed on an annual basis.


Larry’s Plumbing is certified to perform this service.


If your house or business needs a required yearly test, contact us at your convenience to schedule your testing.


Or, simply fill out the form below:

Contact Us

Call us today to discuss your needs and/or to schedule an install/repair, 847-455-4150.