(A) The type of protection required by this subchapter shall depend on the degree of hazard which exists.
(B) The following types of protection, as determined by the Water Department, shall be required.
(1) An approved air gap separation shall be installed where the water system may be contaminated with substances that are dangerous to the public health and could cause severe health hazard.
(2) An approved air gap separation or an approved reduced pressure zone device shall be installed where the water system may be contaminated with a substance that could cause a system or health hazard.
(3) An approved air gap separation or an approved reduced pressure zone device or an approved double check valve assembly shall be installed where the water system may be polluted with substances that would be objectionable but not dangerous to health.
(4) A backflow preventer or vacuum breaker shall be installed on any water outlet to which a hose could be connected, at the consumer’s cost and expense.
(5) Each fixture supply pipe shall be protected from backflow by having all outlets from which potable water flows spaced a sufficient distance above the flood level rim of the receptacle into which the water flows to provide a “minimum” air gap. The fixture shall be equipped with an accessibly located backflow preventer installed beyond the manual control valve. Vacuum breakers on aspirators shall be at least 12 inches above waste material and at least 18 inches above top of table in funeral homes. The distance for the vacuum breaker on a bed pan sterilizer shall be 24 inches above overflow rim of the fixture. A vacuum breaker shall be installed on all yard and wall hydrants. On certain installations such as hospitals, clinics, plating shops, chemical plants, embalming establishments and multi-storied buildings, backflow preventers of a type approved by the Water Department, shall be installed on the building side of the meter.
(Ord. 5-1989, passed 8-14-1989)