(A)   Required. Backflow prevention devices shall be installed where, in the judgment of the city, the nature and extent of activities or the materials stored on the premises would present an immediate and dangerous hazard to health and/or be deleterious to the quality of the water should a cross-connection occur even though such cross-connection does not exist at the time. Backflow prevention devices shall be installed under circumstances including, but not limited to, the following:
      (1)   Premises having an auxiliary water supply;
      (2)   Premises having internal cross-connections that are not correctable or intricate plumbing arrangements which make it impossible to ascertain whether or not cross-connections exist;
      (3)   Premises where entry is restricted or denied;
      (4)   Premises having a history of cross-connections being established or reestablished;
      (5)   Premises on which any substance is handled under pressure so as to permit entry into the public water supply or where a cross-connection could reasonably be expected to occur. This shall include the handling of process waters and cooling waters;
      (6)   Premises where materials of a toxic or hazardous nature are handled in such a way that, if back siphonage should occur, a serious health hazard might result; and
      (7)   Other premises, as specified by the city, where backflow prevention devices are required to protect the public water supply.
   (B)   Type of protective device. The AWWA PNWS Cross-Connection Control Manual, as it now exists or is hereafter amended, is adopted by the city by reference and shall be followed in determining the type and installation of cross-connection control devices. A copy of the current manual being used by the city shall be kept at the City Clerk’s office at City Hall.
   (C)   Place of installation. Backflow prevention devices required by this chapter shall be installed at the property line of the premises or at a location designated by the city. The device shall be located so as to be readily accessible for maintenance and testing and where no part of the device can become submerged.
   (D)   Installation. Backflow prevention devices required by this chapter shall be installed under the supervision of, and with the approval of, the city. Only backflow prevention devices approved by the American Association of Sanitary Engineers (AASE), International Association of Plumbing and Mechanical Officials (IAPMO) and the Uniform Plumbing Code (UPC) will be allowed.
   (E)   Inspection and testing. Backflow prevention devices installed pursuant to this chapter, except atmospheric vacuum breakers, shall be inspected and tested annually, or more often if necessary, by a state-certified backflow prevention device tester. Inspections, tests and maintenance shall be at the owner’s expense. Whenever the devices are found to be defective, they shall be repaired, overhauled or replaced at the owner’s expense. Annual test results and records of supporting data, or copies thereof, must be filed with the city’s Department of Public Works.
(Ord. 05-18-15, passed 5-18-2015)