Below is a link to the City's policy for Backflow Prevention Requirements.You will need Adobe Acrobat Reader to view the files.
Backflow Prevention Requirements - Requirements, Surveying, Existing Connections
Approved Backflow Prevention Assemblies-Revised Feb.24,2003
Only units currently approved by the TN Division of Water Supply are to be used for the protection of Public Water Systems against backflow hazards. For the information on any units that may have been aproved since the printing of this list call the Division of Water Supply at (615) 532-0164 or the Fleming Training Center at (615)898-8090.
Note: Double check-detector check and double check valve assemblies have only been approved by the Division of Water Supply for certain (moderate to low hazard) fire service lines. Reduced pressure backflow prevention devices are required for domestic and/or process service lines where maximum backflow protection is needed.
Unless otherwise specified by the manufacturer all assemblies are to be installed on cold potatle water applications - below 110 F. Also all Double Check Valve Assemblies, Reduced Pressure Principle Assemblies, Double Check Detector Assemblies, and Reduced Pressure Principle Detector Assemblies are Approved for HORIZONTAL ORIENTATION ONLY, unless specifically noted. Use of spare parts other than those of the original manufacturer invalidates the Approval. The following are lists of Approved assemblies by manufacturer.
Double Check Valve Assemblies
Double Check Valve Detector Assemblies
Reduced Pressure Principle Detector Assemblies & Reduced Pressure Princliple Assemblies
Breakers which include:
- Atmospheric Vacuum Breakers
- Pressure Vacuum Breakers
- Spill Resistant Pressure Vacuum Breakers
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