(A) In building or industrial plants where multiple piping systems are used for water, extreme care shall be taken not to interconnect the systems. Where water from the water system is used to service systems of lesser quality such as fire protection, plumbing, fixtures, vats, tanks, boilers, sewer ejectors, pumps and numerous other hazardous items, the potable water system must be separated or protected from such cross-connections by an air gap separation, vacuum breakers, reduced pressure backflow preventers or double check valves.
(B) (1) Each outlet on the non-potable water line, which may be inadvertently used for drinking water shall be posted “Danger - Unsafe Water”. Other pipes shall be painted or banded at appropriate intervals and stenciled to identify their contents and director of flow. The following system shall be used:
Chemical | Orange color | Stenciled “Chemical” |
Fire protection | Red color | Stenciled “Fire” |
Gas | Black color | Stenciled “Gas” |
Non-potable water | Brown color | Stenciled “Non-Potable Water” |
Potable water | Green color | Stenciled “Potable Water” |
(2) Colored plastic bands may be used instead of paint, i.e., Dymo tape with legends, so long as labels or bands are permanently fastened to pipes.
(Ord. 5-1989, passed 8-14-1989)