(A) A specialist employed by or under contract with the City shall determine the type of backflow assemblies to be installed within the City’s water system. All assemblies shall be installed at the service connection unless it is determined by the specialist and approved by the Superintendent that it should be installed at the point of use.
(B) An approved assembly shall be required in each of the following circumstances, but the specialist is in no way limited to the following circumstances:
(1) In the case of any premises where there is any material dangerous to health which is handled in such a fashion as to permit entry into potable water system, the potable water system shall be protected by an approved air gap separation or an approved reduced pressure principle backflow prevention assembly;
(2) When the nature and extent of any activity at a premises, or the materials used in connection with any activity at premises, or materials stored at a premises, could contaminate or pollute the potable water supply;
(3) When a premises has one or more cross-connections, as that term is defined in § 52.02;
(4) When internal cross-connections are present that are not correctable;
(5) When intricate plumbing arrangements are present making it impractical to ascertain whether cross-connections exist;
(6) When the premises has a repeated history of cross-connections being established or reestablished;
(7) When entry to the premises is restricted so that surveys for cross-connections cannot be made with sufficient frequency to assure cross-connections do not exist;
(8) When materials are being used such that, if backflow should occur, a health hazard could result;
(9) When an appropriate cross-connection survey report form has not been filed with the City Superintendent;
(10) Any and all used water return systems;
(11) If a point-of-use assembly has not been tested or repaired as required by this subchapter, the installation of a reduced pressure principle assembly will be required at the service connection;
(12) There is piping or equipment for conveying liquids other than potable City water and that piping or other equipment is under pressure and installed and operated in a manner that could cause a cross-connection;
(13) When installation of an approved backflow prevention assembly is deemed by a specialist to be necessary to accomplish the purpose of this subchapter;
(14) The use of any type of chemical spray attachment connected to the premises plumbing, including garden hose fertilizers and pesticide applicators, is not allowed within the City’s water system without proper protection from the potential of backflow occurring;
(15) The use of any type of radiator flush kits attached to the premises plumbing is not allowed within the City’s water system without proper protection from backflow occurring;
(16) Wherever reclaimed water or ditch water is used on premises;
(17) When there is a premises with an auxiliary water supply which is interconnected to the City water service or supply system;
(18) In a nonresidential multi-story building or any building with a booster pump or elevated storage tank; and
(19) When required by the current OAR.
(Ord. 620, passed 10-7-2009)