(A) The type of protection required under § 1041.06(A), (B) and (C) shall depend on the degree of hazard which exists, as follows:
(1) An approved air gap separation shall be installed where the public 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 device shall be installed where the public potable water system may be contaminated with a substance that could cause a system or health hazard.
(3) An approved air gap separation, an approved reduced pressure principle backflow prevention device or an approved double check valve assembly shall be installed where the public potable water system may be polluted with substances that could cause a pollution hazard not dangerous to health.
(B) The type of protection required under § 1041.06(D) shall be an approved air gap separation or an approved interchangeable connection.
(C) Where an auxiliary water supply is used as a secondary source of water for a fire protection system, the approved air gap separation or approved interchangeable connection, provided for in division (B) of this section, may not be required, provided that:
(1) At premises where the auxiliary water supply may be contaminated with substances that could cause a system or health hazard, the public or consumer's potable water system shall be protected against back flow by the installation of an approved reduced pressure principle backflow prevention device.
(2) At all other premises, the public or consumer's potable water system shall be protected against backflow by the installation of either an approved reduced pressure principle backflow prevention device or an approved double check valve assembly.
(3) The public 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 public 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 device.
(6) The water in the fire protection system shall contain no additives.
(`82 Code, § 1041.07) (Ord. 88-58, passed 7-5-88)