(1) “Approved backflow preventive device” means a device to counteract back pressures or prevent back siphonage. This device must appear on the list of approved devices issued by the Washington State Board of Health, or by its successor state agency.

(2) “Backflow” means the flow in the direction opposite to the normal flow or the introduction of any foreign liquids, gases, or substances into the water system of the Town of Garfield’s water.

(3) “Contamination” means the entry into or presence in a public water supply system of any substance which may be deleterious to health and/or quality of the water.

(4) “Cross connection” means any physical arrangement where a public water system is connected, directly or indirectly, with any other non-drinkable water system or auxiliary system, sewer, drain conduit, swimming pool, storage reservoir, plumbing fixture, contaminated water, sewage, or other liquid of unknown or unsafe quality which may be capable of imparting contamination to the public water system as a result of backflow. Bypass arrangements, jumper connections, removable sections, swivel or change over devices, or other temporary or permanent devices through which, or because of which, backflow may occur are considered to be cross connections.

(5) “Health hazard” means an actual or potential threat of contamination or physical or toxic nature to the public potable water system or the consumer’s potable water system that would be a danger to health.

(6) “Plumbing hazard” means an internal or plumbing-type cross-connection in a consumer’s potable water system that may be either a pollutional or a contamination-type hazard. This includes, but is not limited to, cross-connections to toilets, sinks, lavatories, washtrays, domestic washing machines and lawn sprinkling systems. Plumbing-type cross-connections can be located in many types of structures including homes, apartment houses, hotels and commercial or industrial establishments.

(7) “Potable water supply” means any system of water supply intended or used for human consumption or other domestic use.

(8) “Premises” means any place of land to which water is provided including all improvements, mobile home(s) and structures located on it.

(9) “Reduced pressure principle device” shall mean assembly containing two independently acting approved check valves together with a hydraulically-operated, mechanically independent pressure differential relief valve located between the check valves and at the same time below the first valve. The device shall include properly located test cocks and tightly closing shut off valves at the end of the assembly. A check valve is approved if it appears on the list of approved devices issued by the Washington State Board of Health, or its successor state agency. (Ord. 282-N, §3, 2001)