Backflow Testing • Certification • Repair • Installation • Annual Compliance
Protect your property and stay compliant with Naperville's backflow testing requirements. Fox Valley Plumbing & Backflow provides certified backflow testing, preventer repair, and new installations for residential and commercial properties throughout Naperville and the Fox River Valley. Licensed, insured, and trusted by hundreds of local property owners.
If you own a commercial property in Naperville, have an irrigation system tied to city water, or operate a business that requires a backflow prevention device, annual testing is not optional. The City of Naperville mandates that all backflow preventers be tested every year by a certified backflow tester to ensure the public water supply stays safe from contamination. Fox Valley Plumbing & Backflow holds the certifications, equipment, and experience to handle every aspect of backflow compliance, from annual testing and certification to repair and new installation.
We serve property owners across Naperville, from commercial buildings along Dundee Avenue and the Route 20 corridor to residential irrigation systems in neighborhoods like Bowes Creek, Highlands of Naperville, and properties near the Fox River. Our certified testers arrive on time, perform the test efficiently, and submit all required paperwork directly to the Naperville water department on your behalf.
Missed deadlines and failed tests can result in fines and even water service disconnection. Don't risk non-compliance. Fox Valley Plumbing makes backflow testing in Naperville simple, fast, and affordable so your property stays protected and in full compliance with city regulations.
Backflow testing is the process of verifying that your backflow prevention device is functioning correctly and keeping contaminants out of Naperville's public water supply. During the test, a certified tester connects differential pressure gauges to the test cocks on your preventer and measures the performance of each check valve and relief valve under controlled conditions.
Here's what our annual testing service includes:
The City of Naperville requires that test reports be submitted by the annual compliance deadline. Late filings can trigger violation notices and penalties. Fox Valley Plumbing tracks your testing schedule and can send reminders so you never miss a deadline.
Not all backflow preventers are the same. The type of device required for your Naperville property depends on the degree of hazard, your water use, and local plumbing code. Fox Valley Plumbing installs, tests, and repairs all major types of backflow prevention assemblies.
Common backflow preventer types we work with:
Choosing the wrong type of preventer can lead to code violations and failed inspections. Our team evaluates your property's water system, identifies the hazard level, and recommends the correct device that satisfies both Naperville plumbing code and Illinois EPA requirements.
When a backflow preventer fails its annual test or shows signs of malfunction, prompt repair is essential. A failed device means your property is out of compliance with Naperville's water regulations, and the city requires the issue to be resolved and the device retested before the reporting deadline. Fox Valley Plumbing diagnoses and repairs backflow preventers on the spot in most cases, getting you back into compliance the same day.
Common backflow preventer failures we repair include:
We carry a full inventory of replacement parts for Watts, Wilkins, Febco, and Ames backflow preventers. When repair costs approach the price of a new unit, or when the device has reached the end of its serviceable life, we'll give you an honest recommendation on whether replacement makes more sense. No unnecessary upsells, just straightforward advice.
Need backflow testing or repair in Naperville? We handle the test, the paperwork, and the city filing.
(847) 624-3872Whether you're opening a new business in Naperville, adding an irrigation system to your property, or the city has notified you that a backflow prevention device is required on your water service, Fox Valley Plumbing handles the entire installation process from start to finish.
Our backflow installation service covers:
New construction, tenant buildouts, and commercial renovations in Naperville often trigger backflow preventer requirements. The City of Naperville plumbing inspector will require the device to be installed, tested, and certified before occupancy or water service activation. We coordinate directly with city inspectors to keep your project on schedule.
The City of Naperville enforces a strict cross-connection control program managed by the Naperville water department. This program is designed to protect the municipal drinking water supply from contamination caused by backflow events. If your property has a backflow prevention device, understanding the compliance requirements is critical to avoiding penalties.
Key compliance facts for Naperville property owners:
Naperville's compliance program applies to commercial properties, industrial facilities, restaurants, medical offices, properties with lawn irrigation systems connected to city water, and buildings with fire suppression systems. If you've received a notice from the Naperville water department, call Fox Valley Plumbing and we'll get your property into compliance quickly.
If your Naperville property has a lawn sprinkler or irrigation system connected to the city water supply, a backflow preventer is required by both Naperville municipal code and the Illinois Environmental Protection Agency. Without a properly functioning preventer, fertilizers, pesticides, herbicides, and standing water from your irrigation system could siphon back into the public water supply during a pressure drop.
Fox Valley Plumbing provides complete irrigation backflow services:
Many Naperville homeowners in neighborhoods like Bowes Creek Country Club, the Highlands, Kenyon Farm, and properties along the Fox River corridor have irrigation systems that require annual backflow testing. We coordinate with your landscaper's spring startup schedule so your irrigation system and backflow device are both ready for the season.
Our technicians hold valid Illinois CCCDI backflow testing certifications. Your test results are accepted by the City of Naperville.
Master Plumber License #058-161084. Plumbing Contractor #055-042593. Fully bonded and insured.
We complete the certification report and file it directly with the Naperville water department. You don't have to worry about deadlines.
Upfront pricing for testing, repair, and installation. Multi-device discounts for commercial properties with several preventers.
Call (847) 624-3872 or fill out our form. We'll confirm your device type, location, and schedule your test appointment.
Our certified tester arrives on time, connects calibrated gauges to your preventer, and performs the full diagnostic test.
If the device passes, we complete the certification report on site. If it fails, we diagnose the issue and discuss repair options.
We submit your passing test report directly to the Naperville water department so your property is in full compliance.
"Fox Valley tests all the backflow devices at our commercial property every year. They show up on time, handle the testing quickly, and file the paperwork with the city so I don't have to chase it down. Reliable and professional every single time."
Google Review - Naperville, IL
"My irrigation backflow preventer failed the annual test and I was worried about the compliance deadline. Fox Valley repaired the check valves, retested it the same visit, and filed the passing report with the city. Saved me from a fine and a second service call."
Angi Review - Naperville, IL
"We got a notice from the Naperville water department that our building needed a backflow preventer installed. Fox Valley handled the permit, installed the RPZ, tested it, and got us compliant within a week. Great communication throughout the whole process."
HomeAdvisor Review - Naperville, IL
The City of Naperville requires backflow preventer testing every year. Commercial properties, fire suppression systems, and irrigation systems with backflow devices must all be tested annually by a certified tester. Test reports must be submitted to the Naperville water department by the compliance deadline to avoid penalties or water service interruption.
If your backflow preventer fails the annual test, it must be repaired and retested before the compliance deadline. Fox Valley Plumbing can diagnose the failure on the spot, perform the necessary repair such as replacing check valves, springs, or seals, and retest the device the same day in most cases. A passing report is then submitted to the City of Naperville.
Backflow testing in Naperville typically costs between $75 and $200 per device, depending on the type and size of the preventer. RPZ assemblies generally cost more to test than double check valves. Fox Valley Plumbing offers competitive pricing and discounts for properties with multiple devices. We provide the test, the certification paperwork, and the city filing all included in the price.
Any property in Naperville with a backflow prevention device is required to have it tested annually. This includes commercial buildings, restaurants, medical facilities, properties with irrigation systems connected to city water, buildings with fire suppression systems, and any property where the city has mandated a backflow preventer to protect the public water supply.
A backflow preventer is a mechanical device installed on your water line that stops contaminated water from flowing backward into the public water supply. Backflow can occur when water pressure drops due to a main break, fire hydrant use, or heavy demand on the system. Without a preventer, chemicals, fertilizers, or other contaminants from your property could enter the municipal water system. Naperville requires these devices on commercial properties, irrigation systems, and other high-risk connections.
Fox Valley Plumbing provides backflow testing, repair, and installation to all Naperville neighborhoods and surrounding areas.
Call now for same-day service. Licensed, insured, and trusted throughout the Fox River Valley.
(847) 624-3872Monday-Friday 7am-6pm | Saturday 8am-2pm | Emergency Service Available 24/7
