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Backflow Testing Services in Oakville, Missouri

Finding a reliable backflow testing professional in Oakville, Missouri is essential for maintaining a safe water supply and staying in compliance with local regulations. Our directory lists 16 backflow testing companies serving Oakville and surrounding communities including Mehlville, Kirkwood, University City.

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 Oakville area.

Most water authorities in Missouri 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 Oakville 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.

16 listed providers

Services:
Flow King Rooter Plumbing backflow testing
4 mi

Flow King Rooter Plumbing

4.9(32)

St. Louis, MO · 4 mi

Preventer InstallationPreventer RepairCommercial
Website
Lemay Plumbing, Inc. backflow testing
5 mi

Lemay Plumbing, Inc.

4.3(43)

St. Louis, MO · 5 mi

ResidentialEmergency Service
Website
Merlo Plumbing Co. Inc. backflow testing
Testing Verified
7 mi

Merlo Plumbing Co. Inc.

3.6(54)

Testing Verified · St. Louis, MO · 7 mi

Backflow TestingCommercialEmergency Service
Website
Pro Outdoor - formerly Professional Irrigation Systems backflow testing
7 mi

Pro Outdoor - formerly Professional Irrigation Systems

No reviews yet

Sunset Hills, MO · 7 mi

Sprinkler Backflow
Website
Signature Plumbing Services St Louis backflow testing
Testing Verified
7 mi

Signature Plumbing Services St Louis

No reviews yet

Testing Verified · Webster Groves, MO · 7 mi

Backflow TestingEmergency ServiceSame Day Service
Website
Mr. Rooter Plumbing of St. Louis backflow testing
9 mi

Mr. Rooter Plumbing of St. Louis

No reviews yet

Fenton, MO · 9 mi

Emergency Service
Website
Linek Plumbing Company backflow testing
Testing Verified
9 mi

Linek Plumbing Company

No reviews yet

Testing Verified · Webster Groves, MO · 9 mi

Backflow TestingPreventer InstallationPreventer Repair
Website
Maplewood Plumbing & Sewer, LLC. backflow testing
Testing Verified
10 mi

Maplewood Plumbing & Sewer, LLC.

No reviews yet

Testing Verified · St. Louis, MO · 10 mi

Backflow TestingPreventer RepairCommercial
Website
Tony LaMartina Plumbing Co. Inc backflow testing
11 mi

Tony LaMartina Plumbing Co. Inc

No reviews yet

St. Louis, MO · 11 mi

Website
SL
Testing Verified
11 mi

St Louis Backflow Services

3.4(5)

Testing Verified · St. Louis, MO · 11 mi

Backflow Testing
Website
Roto-Rooter Plumbing & Water Cleanup backflow testing
12 mi

Roto-Rooter Plumbing & Water Cleanup

4.8(5,322)

St. Louis, MO · 12 mi

CommercialResidentialEmergency Service
Website
Classic Aire Care backflow testing
15 mi

Classic Aire Care

No reviews yet

St. Louis, MO · 15 mi

CommercialEmergency Service
Website
Missouri American Water backflow testing
16 mi

Missouri American Water

1.6(231)

Creve Coeur, MO · 16 mi

Emergency Service
Website
BI
17 mi

Ballwin Irrigation Services

No reviews yet

Ballwin, MO · 17 mi

Preventer RepairEmergency Service
Website
MPR Supply Co backflow testing
Testing Verified
17 mi

MPR Supply Co

No reviews yet

Testing Verified · St. Louis, MO · 17 mi

Backflow Testing
Website
Flow King Rooter backflow testing
18 mi

Flow King Rooter

4.7(94)

Maryland Heights, MO · 18 mi

Preventer InstallationPreventer RepairCommercial
Website

Frequently Asked Questions About Backflow Testing in Oakville

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 Oakville 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 Missouri require cross-connection control programs for commercial properties and irrigation systems.

Many municipalities in Missouri require annual backflow testing for commercial and residential properties with backflow prevention devices. Your local water authority in Oakville can confirm the exact testing schedule and deadlines for your area. Failing to test on time may result in fines or water service interruption.

Some certified testers near Oakville offer same-day or emergency scheduling for urgent situations such as a failed device, a compliance deadline, or a new construction inspection. Check individual provider listings above for availability, or request a quote to find a tester who can accommodate your schedule.

Look for testers with active state certification, strong Google reviews, and experience with your type of backflow preventer (PVB, DCVA, or RPZ). Ask whether they file compliance reports with your local water authority and request a written estimate before scheduling. Our directory lists testers near Oakville with real customer reviews.

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