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San Antonio Backflow Test Gauge

Backflow Preventer

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Keep Your Family and Business Safe with Our Comprehensive Services



As a family-owned local San Antonio business, we understand the importance of keeping your loved ones and property safe. That's why we're dedicated to providing top-quality backflow testing and prevention services to homes and businesses throughout the area.


Our team of highly skilled technicians is trained and certified to provide comprehensive backflow testing services. We use the latest technology and equipment to ensure accurate results and efficient service. We're always up to date with the latest regulations and industry standards, so you can trust that you're in good hands with us.


We're proud to have earned a reputation as a trusted and reliable backflow testing company in our community. We're grateful for the opportunity to serve you and look forward to helping you protect your water supply for years to come.


What We Provide

Double Check Backflow Assembly on fireline bypass in San Antonio
GMR Backflow Tech Repairing Backflow Fireline In San Antonio

A residential backflow test is a process of inspecting and testing a home's backflow preventer to ensure that the water supply is not contaminated by any backflow or reverse flow of non-potable water or other harmful substances. This test is typically performed annually and requires a certified backflow technician to perform the inspection and testing.

A commercial backflow test is a process of testing the backflow preventers of a commercial or industrial building to ensure that the potable water supply is protected from contamination caused by reverse flow of non-potable water or other harmful substances. This test is typically required by local water authorities and may need to be performed annually or more frequently depending on the type of business and the level of risk. A certified backflow tester is required to perform the inspection and testing

A fire line backflow test is a process of inspecting and testing the backflow prevention device on a fire sprinkler system to ensure that it is functioning properly and preventing the contamination of the potable water supply. This test is required by local fire departments and water authorities and is typically performed annually. A certified backflow tester with expertise in fire line backflow prevention is required to perform the inspection and testing.

Choose Your Location to Schedule Your Test

What is a Backflow Test?

A backflow test is an inspection designed to ensure the backflow prevention assemblies are preventing backflow properly. Backflow occurs when water flows backward from a property into the public water supply, potentially contaminating it with harmful substances. To prevent this, backflow prevention devices, are installed in plumbing or irrigation systems.

San Antonio Backflow Inspection Test
American backflow prevention association logo

Proud Member of the ABPA San Antonio

As a proud member of the American Backflow Prevention Association, GMR Backflow is committed to upholding the highest standards of backflow prevention and protecting the safety and health of our customers and the public. Our membership allows us to stay up-to-date with the latest industry developments, regulations, and best practices, and to connect with other professionals who share our passion for quality and excellence. We believe that our affiliation with ABPA reflects our dedication to professionalism, integrity, and continuous improvement, and we are honored to be part of such a reputable and respected organization.

Licensed through TCEQ

We are proud to be licensed by the Texas Commission on Environmental Quality (TCEQ), demonstrating our commitment to meeting the highest standards of quality and compliance in the backflow prevention industry. Our TCEQ license allows us to provide our customers with the confidence and peace of mind that they are receiving reliable and professional services from a qualified and reputable provider.


Meet Your Backflow Technician

Our growing team is a dynamic group of dedicated professionals who are passionate about providing the best backflow prevention services to our customers. With a diverse range of backgrounds and expertise, our team is committed to continuous learning and improvement.

Schedule Your Backflow Test!

We hired Gabriel to test backflow preventers at our new apartment build. He is knowledgeable and responsive. I recommend calling him if you need backflow preventers inspected for SAWS.

Jake Buza

GMR conducted my Backflow inspection. Gabriel was outstanding. Another company failed to show or return my calls so I tried GMR. Gabriel was professional, friendly, and charged a fair price. I will use him annually. Highly recommend!


GMR made my backflow check easy. One phone call and the appointment was made and everything was taken care of. We're all busy these days and GMR made it easy to cross another thing off the list. Thank you.

Michael Black

Thank you GMR Backflow for taking care of our home and Gabriel Rubio for everything and for answering my concerns and I highly recommend them.

Noemi Ramirez


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