SAWS’ Cross-Connection Control Backflow Prevention Program safeguards public drinking water and protects the health of our customers.
Annual testing of these plumbing devices is required by City of San Antonio ordinance and state regulations. This testing ensures the public water supply, as well as your home or business, is protected from harmful contamination.
Requirements for annual testing of backflow prevention assemblies.
Customer Service InspectionA CSI is required before continuous water service for new construction is established.
BSI Backflow AcademyComprehensive training and resources to help you master the complexities of backflow management.
FAQsFrequently asked questions regarding backflow prevention.
Backflow Prevention Program ManualDownload program manual.
SAWS has contracted with Backflow Solutions Inc., or BSI, to help manage San Antonio’s backflow prevention program.
Beginning Dec. 1, 2024, BSI will:
- Send backflow assembly due and past due notices on behalf of SAWS.
- Customer Service Inspections (CSIs) will be managed by BSI Online.
Water Customers
For questions regarding your backflow prevention device test, please contact BSI Online:
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- Phone: 888-966-6050
- Email: support@backflow.com
- Find a registered testing company or check your property’s compliance here: bsionlinetracking.com/customer
Backflow Tester/Customer Service Inspectors
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- Phone: 800-414-4990
- Email: bsionline@backflow.com
- Submit tests here: bsionline.com
Backflow Prevention Assemblies
To protect the water system, backflow prevention assemblies (devices that prevent the backflow of water) are required for all connections that may present a potential source of contamination of the public water system. There are two kinds of assemblies installed:
- External backflow assemblies are used to protect the public water system from possible contamination resulting from the customer’s premises.
- Internal backflow assemblies are used to protect the customers from potentially hazardous cross connections within their own drinking water system.
Backflow Prevention Devices
Backflow Prevention Assemblies used to protect the public water system
- To keep the drinking water safe, SAWS reviews and stamps the utility plans of each new customer for compliance with cross-connection control/backflow prevention requirements. SAWS inspects the installation, repair or replacement of external backflow prevention assemblies, and monitors and enforces the annual testing requirements for those assemblies.
Backflow Prevention Assemblies used to protect the customer’s drinking water system
Initial permitting and inspection for backflow assemblies, including new installations, repairs and replacements, are administered through the City of San Antonio Development Services Department, 1901 S. Alamo, 210-207-1111.
Backflow Prevention Guidelines
For questions or concerns regarding backflow prevention contact:
SAWS Backflow Prevention
2800 U.S. Hwy 281 North
Tower II
San Antonio, Texas 78212
210-233-2910 | backflow@saws.org