(A) Any backflow preventer existing as of the effective date of this chapter that is properly installed and properly functioning shall be allowed by the city to continue in service unless the degree of hazard is such as to supersede the effectiveness of the present backflow preventer, or result in an unreasonable risk to the public health. Where the degree of hazard has increased, as in the case of a residential installation converting to a business establishment, the existing backflow preventer must be upgraded to ensure an appropriate assembly is installed consistent with the increased degree of hazard. A permit must be obtained from the city.
(B) All approved backflow preventers installed as of the effective date of this chapter that do not meet the requirements of this chapter shall be removed and replaced with a backflow preventer meeting the requirements of this chapter. The customer shall pay for all costs of replacement and obtain any required permit from the city. However, single-family residential customers shall receive replacement city-owned dual check devices at no cost through January 1, 2018.
