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 Backflow Prevention
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IMPORTANT CHANGES - Effective December 4, 2014, all test reports for existing and replacement backflow devices must be submitted online through BSI Online.  The City of Round Rock has partnered with Backflow Solutions, Inc. (BSI Online) as administrator of the Backflow Prevention Program.  All backflow testers must register on the BSI Online Database in order to submit reports.

Beginning January 1, 2015, a $12.95 fee will be charged for each report submitted.  New installations will not have a fee and are still required to be turned in to Building Inspections.  If you have any questions regarding the new Backflow Prevention Program, please contact BSI at (800) 414-4990.

List of Registered Backflow Testers

Backflow Prevention Information
Backflow is a hydraulic condition, caused by a difference in pressure, that causes non-potable (unsafe for consumption) water or other fluid to flow into the water system and contaminate the drinking water.  For example, if a water main breaks, or there is unexpectedly high demand on the water system, the reduced pressure in the pipe may allow contaminated water to be drawn up into the system.  Therefore, preventing backflow events is essential for protecting the drinking water quality.

Backflow prevention devices are used to protect potable water supplies from contamination or pollution due to backflow by preventing water from flowing back into the water system. Typically, backflow prevention devices are required for plumbing system connections that contain chemicals or industrial fluids, irrigation systems, fertilizers or auxiliary water sources (including reclaimed water). These devices are subject to inspection, maintenance, testing and reporting requirements to ensure each device continues to protect against cross contamination.

The City of Round Rock has partnered with Backflow Solutions, Inc. to administer the backflow prevention program, ensuring backflow prevention devices are installed and maintained in compliance with federal, state and local codes. 

Backflow Prevention Device Testing
In accordance with the City's Code of Ordinances, Chapter 44 - Utilities, Article VII and the Texas Commission on Environmental Quality (TCEQ), Chapter 290 - Public Drinking Water Regulations, backflow prevention devices are required to be tested as outlined below.

  • Annual Testing of Backflow Prevention Devices is required for High Hazard backflow prevention.  These are typically devices used for non-residential purposes, such as hospitals, restaurants, industries, etc. in which there is a high risk of contamination from backflow into the water system.
  • 10 Year Testing of Backflow Prevention Devices is required for Low Hazard backflow prevention. These are typically devices used for residential purposes, such as irrigation systems. The risk for contamination is much lower than those considered High Hazard and therefore are required to be tested once every 10 years.

Failure to complete the required testing - If a property owner and/or person in control of an assembly device fails to test the device within 30 days of the required testing date, the regulatory authority may perform the test and assess a testing fee of $100 for each separate assembly device on which the regulatory authority performs a test. 

Backflow Prevention Tester Information
In accordance with the City's Code of Ordinances, Chapter 44 - Utilities, Article VII, Section 44.187, persons desiring to be approved backflow prevention assembly testers within the City must provide to BSI Online proof of commission licensing, and provide proof that their testing equipment is able to maintain a calibration of plus or minus 0.2 psid accuracy. 

  • Backflow Prevention Assembly Tester (BPAT) license and gauge calibration certification must be submitted and maintained before any backflow test reports will be entered into system.  Information can be mailed, faxed or emailed.  (see below)
  • Reports will be rejected if updated license and gauge information are not on file and not available upon request of City Backflow Official.
  • For more information on registering for the City of Round Rock, please contact BSI Online at (800) 414-4990.

A list of Backflow Testers currently registered with the City is available here: Registered Backflow Testers

Forms for backflow permits and new installation inspections can be obtained by contacting the Building Inspection Division located at  301 W. Bagdad Ave, Round Rock, TX 78664, Phone: 512-218-5550, Fax: 512-218-5563, or Email Chief Building Official

To retrieve the ordinance information on backflow prevention, go to Round Rock Code of Ordinances and enter "Section 44.178" in the Search box.

Tel: (512) 218-5575
Fax: (512) 218-6649

2008 Enterprise Drive
Round Rock, Texas 78664

Send your backflow reports, questions or comments to: Eric Warnke


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City of Round Rock | 221 East Main Street, Round Rock, Texas 78664 | Phone: (512) 218-5400
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