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Assembly Installation & Maintenance

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Commercial, existing agricultural, industrial, institutional, and multi-family water service customers are required to have backflow prevention assemblies.

  • The installation of these assemblies may be required by any building or property improvement and/or an inspection by a Cross Connection Control Specialist.
  • Backflow prevention assemblies are required to be tested upon installation, anytime the assembly is required, replaced or relocated, and on an annual basis.
  • The testing must be completed by a San Bernardino County Backflow Assembly Tester. Here's a list of companies that test in the district.