Backflow Testing Services in Florissant, Missouri
Finding a reliable backflow testing professional in Florissant, Missouri is essential for maintaining a safe water supply and staying in compliance with local regulations. Our directory lists 18 backflow testing companies serving Florissant and surrounding communities including Hazelwood, Maryland Heights, Saint Charles.
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 Florissant 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 Florissant 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.
18 listed providers

Roto-Rooter Plumbing & Water Cleanup
St. Louis, MO · 12 mi
Maplewood Plumbing & Sewer, LLC.
No reviews yet
Testing Verified · St. Louis, MO · 12 mi
Linek Plumbing Company
No reviews yet
Testing Verified · Webster Groves, MO · 13 mi
Signature Plumbing Services St Louis
No reviews yet
Testing Verified · Webster Groves, MO · 15 mi

Flow King Rooter Plumbing
St. Louis, MO · 19 mi
Pro Outdoor - formerly Professional Irrigation Systems - Chesterfield
No reviews yet
Chesterfield, MO · 19 mi

Pro Outdoor - formerly Professional Irrigation Systems
No reviews yet
Sunset Hills, MO · 19 mi

Merlo Plumbing Co. Inc.
Testing Verified · St. Louis, MO · 20 mi
Helpful resources
Frequently Asked Questions About Backflow Testing in Florissant
Most jurisdictions in Missouri require backflow testers to hold a current certification from an approved training program, typically involving classroom instruction, a hands-on practical exam, and continuing education credits. Some municipalities maintain their own approved-tester lists. Always verify certification before hiring.
Residential tests typically involve a single PVB or DCVA device and are quicker to complete. Commercial properties in Florissant 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 Florissant 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 Florissant, Missouri 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 Florissant 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 Florissant 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.
Nearby Cities in Missouri
For Providers
Own a Backflow Testing Business?
Claim your listing to manage your profile, track leads, and get premium placement.


