Backflow prevention assemblies shall be installed on each service line of a customer's system at or near the property line or immediately inside the building being served, but in all cases before the first branch line leading off the service line wherever any of the following conditions exist:
A. There is an auxiliary water supply which is, or could be, connected to the potable water piping.
B. Where there is piping for conveying liquids other than potable water, and where that piping is installed and operated in a manner which could cause a cross connection.
C. There are cross connections or intricate plumbing which make it impractical to ascertain whether or not a cross connection exists.
D. In the case where there has been a history of repeating the same or similar cross connection or a backflow, even though these have been removed or disconnected.
E. Where there is a building over two (2) stories in height or any plumbing system that is greater than or equal to thirty feet (30') above the water main from which it is served.
F. Where fire hydrants or fire systems are connected to the potable domestic water service within the property being served.
G. Where a single water service is used to supply three (3) or more dwellings.
H. Where the water meter serving the property is one and one-half inches (11/2") or larger.
I. Where there is backflow or back siphonage potential.
J. Where any fixture is subject to being submerged.
K. Where the system is not open for inspection. (Ord. 1140, 12-9-2002)