1. When the nature and extent of any activity at a premises, or the materials used in connection with any activity at a premises, or materials stored at a premises, could contaminate or pollute the potable water supply.

2. When a premises has one (1) or more cross connections as that term is defined in this Chapter.

3. When internal cross connections are present that are not correctable.

4. When intricate plumbing arrangements are present that make it impractical to ascertain whether cross connections exist.

5. When the premises has a repeated history of cross connections being established or re-established.

6. When entry to the premises is restricted so that inspections for cross connections cannot be made with sufficient frequency to assure that cross connections do not exist.

7. When materials are being used such that, if backflow should occur, a health hazard could result.

8. When an appropriate cross connection survey report form has not been filed with the Director.

9. Any and all used water return systems.

10. If a point-of-use assembly that is protecting the City’s distribution system has not been tested or repaired as required by this Chapter, the installation of a reduced pressure principle assembly will be required at the service connection.

11. When there is upon the premises an auxiliary water supply that is or can be connected to the City’s service or supply system.

12. All multi-story buildings and any building with a booster pump or elevated storage tank.

13. There is piping or equipment for conveying liquids other than potable City water and that piping or other equipment is under pressure and installed and operated in a manner that could cause a cross connection.

14. All services 2” or larger.

15. When installation of an approved backflow prevention assembly is deemed by a Specialist to be necessary to accomplish the purpose of these regulations.