(a) The type of protection required under § 1046.28(a), (b), (c), (d), (e), (f), (g) and (j) shall depend on the degree of hazard which exists as follows:
(1) An approved air gap separation shall be installed where the city potable water system may be contaminated with substances that could cause a severe health hazard.
(2) An approved air gap separation or an approved reduced pressure principle backflow prevention assembly shall be installed where the city potable water system may be contaminated with a substance that could cause a system or health hazard.
(b) The type of protection required under § 1046.28(h) shall be an approved air gap.
(c) Where an auxiliary water supply is used as a secondary source of water for a fire protection system, the provisions of division (b) of this section for an approved air gap separation or an approved interchangeable connection may not be required providing.
(1) At premises where the auxiliary water supply may be contaminated with substances that could cause a system or health hazard, the city or consumer's potable water system shall be protected against backflow by installation of an approved reduced pressure principle backflow prevention assembly.
(2) At all other premises, the city or consumer's potable water system shall be protected against backflow by installation of either an approved reduced pressure principle backflow prevention assembly or an approved double check valve assembly.
(3) The city or consumer's potable water system shall be the primary source of water for the fire protection system.
(4) The fire protection system shall be normally filled with water from the city or consumer's potable water system.
(5) The water in the fire protection system shall be used for fire protection only with no regular use of water from the fire protection system downstream from the approved backflow prevention assembly.
(6) The water in the fire protection system shall contain no additives.
(d) Protection required on fire lines is as follows:
(1) The minimum requirement for a fire line is an approved double check detector check valve assembly with approved bypass meter.
(2) All fire lines with or without an auxiliary supply (ponds, wells, any water supply other than from the city water system) or additives included in the fire line will require a reduced pressure back flow prevention assembly.
(3) If at any time it is found that a fire line has been altered to include any of the above conditions or if a fire line has been connected to for purposes other than fire protection, an approved back flow prevention assembly will be required to be installed immediately. Water service shall be discontinued at the time such alteration is discovered and [text missing from ordinance]
(4) If a single tap is supplying both fire suppression and domestic water to a building or facility, the fire line and domestic line will be considered separate for the purpose of determining the necessity of backflow prevention assemblies. Under all circumstances both lines will require a back flow prevention assembly.
(Ord. 19-09, passed 3-14-2019)