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 Backflow Prevention

Backflow Prevention Information

Backflow is a hydraulic condition, caused by a difference in pressures, that causes nonpotable (unsafe for consumption) water or other fluid to flow into the water system and contaminate the drinking water. Preventing backflows is essential for protecting the drinking water quality.

Backflow prevention devices prevent water from flowing back into the water system when the pressure in the water system drops lower than the pressure in the system of unknown quality. 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 connections. Backflow prevention assemblies are evaluated by plumbing inspections performed during initial or remodel construction projects.

The City of Round Rock administers a backflow prevention program to ensure 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 outline below.

  • Annual Testing of Backflow Prevention Devices is required for the devices used for High Hazard backflow prevention.  These are typically backflow prevention 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.
  • Low Hazard Backflow Prevention Devices 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.

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) 218-5555
Fax: (512) 218-7088

910 Luther Peterson Place
Round Rock, Texas 78664

Send your questions or comments to: Sharon

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