A potable water supply system shall be designed, installed and maintained in such
a manner as to prevent nonpotable liquids, solids or gases, either harmful or benign,
from being introduced into the potable water supply through cross connections. This
shall be accomplished by protecting every water outlet from the potable water system
which poses a possible cross connection. Whenever such outlets cannot be protected
in accordance with the minimum air gap, a mechanical device shall be utilized to prevent
backflow from backsiphonage or backpressure, as appropriate, according to the degree
of hazard. In cases where access is denied or restricted, water usage is sufficiently
complex, or the severity of the hazard warrants, the director may require a backflow
preventer immediately downstream from the service connection or at a point approved
by the director.
(Ord. No. 6233-06, § 1)
