941.07 BACKFLOW PREVENTERS.

   (a)    Any backflow preventer required by these rules and regulations shall be of a model or construction approved by the Director of Public Utilities and shall comply with the following:

      (1)    An air gap separation to be approved shall be at least twice the diameter of the supply pipe, measured vertically above the top rim of the vessel, but in no case less than one inch;

      (2)    A double check valve assembly or a reduced pressure principle backflow preventer shall be approved by the Director of Public Utilities, and appear on the current "list of approved backflow preventers" of the Ohio Environmental Protection Agency;

      (3)    An interchangeable connection to be approved shall be either a swing type connector or a four-way valve of the lubricated plug type that operates through a mechanism which unseats the plug, turns it ninety degrees and reseats the plug. Four-way valves shall not be used as stop valves but shall have separate stop valves on each pipe connected to the valve. The telltale port on the four-way valve shall have no piping connected and the threads or flange on this port shall be destroyed so that a connection cannot be made. The four-way valve or swing type connector, when used in connection with a potable and auxiliary water supply, shall have a reduced pressure backflow preventer installed on the potable water line at the interconnection.

   (b)   Existing backflow preventers approved by the Director of Public Utilities at the time of installation and properly maintained shall, except for inspection and maintenance requirements, be excluded from the requirement of subsection (a)( l) hereof providing the Director of Public Utilities is assured that they will satisfactorily protect the public potable water system. Whenever the existing device is moved from the present location or requires more than minimum maintenance or when the Director of Public Utilities finds that the maintenance of the device constitutes a hazard to health or possible pollution of the water supply, the device shall be replaced by a backflow preventer meeting the requirements of these regulations.

   (c)   The use of the approved backflow preventer at the water service connection does not in any way affect or eliminate the need for individual fixture devices or airgap as required by Section 4104: 2-51-38 of the Ohio Basic Building Code. (Ord. 87-4-36. Passed 4-22-87.)