§ 13.08.090. Protection of water system within premises.

A.

Whenever the department determines that drinking water systems on a premises cannot be protected against entry of water from any piping system, equipment or other source not safe or potable for human use, an entirely separate drinking water system shall be installed to supply water at convenient points.

B.

Water systems for fighting fire, derived from a supply that cannot be approved as safe or potable for human use shall, wherever practicable, be kept wholly separate from drinking water pipelines and equipment. In cases where the domestic water system is used for both drinking and firefighting purposes, approved backflow prevention devices shall be installed to protect such individual drinking water lines as are not used for firefighting purposes. The users of such drinking water systems shall be further protected as prescribed by the state and county health departments.

C.

Potable water pipelines connected to equipment for industrial processes or operations shall be disconnected therefrom if practicable. Where disconnection is not practicable, an approved backflow prevention device, the type or kind depending on the degree of hazard, shall be located in the feedline to the process piping or equipment, beyond the last point from which drinking water may be taken. In the event the particular processed liquid is especially corrosive or apt to prevent reliable action of the backflow prevention device, an air-gap separation shall be provided. These devices shall be repaired, overhauled or replaced whenever they are found to be defective. Records of tests, repairs, and replacement shall be kept and submitted to the department.

D.

Sewage pumps and storm water pumps shall not have priming connections directly off any drinking water systems, unless the drinking water system is protected by an air-gap and no connection shall exist between the drinking water system and any other piping equipment or tank in any sewage treatment plant, sewage pumping station, or storm water pumping station.

E.

Backflow protections by an approved backflow protection device operating under the reduced pressure principle shall be provided on each drinking water outlet used for supplying ships or other vessels at piers or waterfronts. These devices must be located where they will prevent the return of water from any ship or vessel into another adjacent ship or vessel or into the public water system.

F.

Where the premises contain dual or multiple water systems and piping, the exposed portions of pipelines shall be painted, banded or marked at sufficient intervals to distinguish clearly which water is safe. All outlets from other than approved water supply systems shall be posted as being unsafe for drinking purposes. All outlets intended for drinking purposes shall be plainly marked to indicate that fact.

(Ord. 95 § 1 (part), 1971: prior code § 3301.9)