A. Where any material dangerous to health could enter the City’s water system, the water system shall be protected by an approved air gap separation or an approved reduced pressure principle backflow prevention assembly.

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

C. When a premises has one or more cross connections.

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

E. When intricate plumbing arrangements are present making it impractical to ascertain whether cross connections exist.

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

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

H. When materials are being used that would result in a health hazard if backflow occurred.

I. When an appropriate cross connection survey report form has not been filed with the City.

J. Any and all used-water return systems.

K. If a point-of-use assembly 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.

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

M. When any type of chemical spray attachment is connected to the plumbing, including garden hose fertilizers and pesticide applicators, without proper protection from the potential of backflow occurring.

N. The use of any type of radiator flush kits attached to the plumbing without proper protection from backflow occurring.

O. Wherever reclaimed water or ditch water is used on premises.

P. When there is a premises with an auxiliary water supply which is interconnected to the City service system.

Q. Any other situation in which the City determines that a backflow prevention assembly is appropriate. [Ord. NS-2182, 2012]