Backflow prevention devices shall be required under the following conditions:
(A) Where a substance is handled in such a fashion as to create an actual or potential hazard to a public water supply system. This shall include premises having sources or systems containing process fluids or waters originating from a public water supply system which are no longer under the sanitary control of the city;
(B) Where internal cross-connections are not correctable in the judgment of the city, or there exists intricate plumbing arrangements which make it impracticable to determine whether or not cross-connections exist;
(C) Where, because of security requirements or other prohibitions or restrictions, it is impossible or impractical to make a complete cross-connection survey;
(D) Where cross-connections have been established or reestablished within the preceding three years; and/or
(E) There is more than one customer service connection which could constitute a potential cross-connection.
(Prior Code, § 51.103) (Ord. 1493, passed 1-25-1993)