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Backflow Testing Services in Oswego, Illinois

Finding a reliable backflow testing professional in Oswego, Illinois is essential for maintaining a safe water supply and staying in compliance with local regulations. Our directory lists 14 backflow testing companies serving Oswego and surrounding communities including Aurora, Plainfield, Batavia.

Whether you need annual backflow testing, RPZ (Reduced Pressure Zone) valve inspection, or cross-connection control services, the providers listed below offer professional testing services for both residential and commercial properties throughout the Oswego area.

Most water authorities in Illinois require annual testing and reporting for all backflow prevention assemblies. A certified backflow tester will inspect your devices, perform the required differential pressure tests, and file compliance reports with your local water authority.

Browse the listings below to compare ratings, read customer reviews, and contact backflow testing professionals near Oswego directly. Use the filters above to narrow results by rating, review count, or specific services like RPZ testing and preventer installation.

Data source: Google Maps. Always verify licensing with your local water authority.

14 listed providers

Services:
Residential Plumbing backflow testing
Testing Verified
4 mi

Residential Plumbing

4.8(664)

Testing Verified · Oswego, IL · 4 mi

Backflow TestingResidentialSame Day Service
Website
DRF Water Heating Solutions backflow testing
Testing Verified
6 mi

DRF Water Heating Solutions

4.7(1,336)

Testing Verified · Plainfield, IL · 6 mi

Backflow TestingCommercialEmergency Service
Website
Wiz Plumbing Inc. backflow testing
7 mi

Wiz Plumbing Inc.

4.9(281)

Naperville, IL · 7 mi

RPZ TestingPreventer InstallationCommercial
Website
Expert Plumbing Heating & Electrical backflow testing
Testing Verified
10 mi

Expert Plumbing Heating & Electrical

4.7(154)

Testing Verified · Naperville, IL · 10 mi

Backflow TestingEmergency Service
Website
Fire Protection Parts backflow testing
12 mi

Fire Protection Parts

5.0(13)

Naperville, IL · 12 mi

DCVA TestingSame Day Service
Website
Marquise Plumbing and Backflow backflow testing
Testing Verified
12 mi

Marquise Plumbing and Backflow

4.9(32)

Testing Verified · Naperville, IL · 12 mi

Backflow TestingRPZ Testing
Website
Blue Whale Backflow, Plumbing, & Excavating backflow testing
Testing Verified
13 mi

Blue Whale Backflow, Plumbing, & Excavating

4.5(46)

Testing Verified · Batavia, IL · 13 mi

Backflow TestingCommercialEmergency Service
Website
D. E. Mathieu Plumbing, Sewer & Water backflow testing
Testing Verified
13 mi

D. E. Mathieu Plumbing, Sewer & Water

5.0(38)

Testing Verified · Warrenville, IL · 13 mi

Backflow TestingPreventer RepairCommercial
Website
Roto-Rooter Plumbing & Water Cleanup backflow testing
Testing Verified
15 mi

Roto-Rooter Plumbing & Water Cleanup

4.8(1,514)

Testing Verified · Naperville, IL · 15 mi

Backflow TestingEmergency ServiceSame Day Service
Website
Jim Dhamer Plumbing and Sewer Inc. backflow testing
16 mi

Jim Dhamer Plumbing and Sewer Inc.

4.6(180)

Lisle, IL · 16 mi

Emergency Service
Website
Valley Fire Protection & Plumbing backflow testing
Testing Verified
16 mi

Valley Fire Protection & Plumbing

4.4(35)

Testing Verified · St. Charles, IL · 16 mi

Backflow TestingCommercialResidential
Website
Northern Illinois Backflow Inc backflow testing
Testing Verified
17 mi

Northern Illinois Backflow Inc

1.0(1)

Testing Verified · West Chicago, IL · 17 mi

Backflow TestingCross-Connection ControlEmergency Service
Website
Complete Backflow Services backflow testing
19 mi

Complete Backflow Services

5.0(1)

Carol Stream, IL · 19 mi

Website

Frequently Asked Questions About Backflow Testing in Oswego

Residential tests typically involve a single PVB or DCVA device and are quicker to complete. Commercial properties in Oswego often have multiple assemblies, RPZ devices, and fire-line backflow preventers that require more time and specialized equipment. Pricing and scheduling may differ for each type.

Many certified backflow testers in Oswego will file test reports directly with your local water authority or municipality on your behalf. Confirm this with your provider before scheduling. Some jurisdictions require the property owner to submit reports, while others accept direct submissions from the tester.

Backflow testing in Oswego, Illinois typically costs between $50 and $200 per device, depending on the type of backflow preventer and the complexity of the installation. RPZ assemblies generally cost more to test than double check valve assemblies. Contact providers listed above for current pricing in the Oswego area.

If a backflow preventer fails its annual test, the certified tester will diagnose the issue — often a worn check valve, damaged disc, or fouled relief valve. Most testers in Oswego can repair the device on site and re-test it the same day. Your water authority may require the passing report within a set deadline.

Cross-connection control prevents contaminated water from flowing backwards into the clean water supply. Backflow prevention devices are installed at cross-connection points to protect public health. Regular testing ensures these devices function properly. Many municipalities in Illinois require cross-connection control programs for commercial properties and irrigation systems.

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