(A) A backflow prevention device required by this chapter shall be of a model or construction approved by the Safety-Service Director and the Director of the Ohio Environmental Protection Agency (EPA) 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 back-flow prevention device shall be approved by the Safety-Service Director and shall appear on the current list of approved backflow prevention devices of the Ohio EPA.
(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 90° and reseats the plug. Four-way valves shall not be used as stop valves but must have separate stop valves on each pipe connected to the valve. The tell-tale 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.
(B) Existing backflow prevention devices approved by the Safety-Service Director or the Ohio EPA at the time of installation and properly maintained shall, except for inspection and maintenance requirements, be excluded from the requirements of division (A) of this section, provided the Safety-Service Director is assured that such devices 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 Safety-Service Director finds that the maintenance of the device constitutes a hazard to health, the device shall be replaced by a backflow prevention device meeting the requirements of this chapter.
(`82 Code, § 1041.08) (Ord. 88-58, passed 7-5-88)