(1) “Air gap” means the vertical physical separation between the free-flowing discharge end of the potable supply line and the overflow rim of the receiving vessel. This separation must be at least twice the inside diameter of the supply line, but never less than one inch. When located near walls, the air gap separation must be increased.

(2) “Approval/approved” means approved in writing by the health authority, city of Electric City, or other agency having jurisdiction.

(3) “Auxiliary water supply” means any water supply on, or available to, a premises other than the city of Electric City’s approved public potable water supply.

(4) “Backflow” means the flow of water or other liquids, gases or solids from any source back into the distribution piping of the public potable supply system.

(5) “Backflow prevention assembly” means an assembly that prevents the backflow of water or other liquids, gases or solids into the city of Electric City’s potable water supply and appears on the health authority approved list.

(6) “Backflow prevention device” means a device which prevents the backflow of water or other liquids, gases or solids into the city of Electric City’s potable water supply and does not appear on the health authority approved list.

(7) “Certified backflow assembly tester” means a person who is certified by the health authority, or other approval agency, to test backflow prevention assemblies.

(8) “Certified cross connection control specialist/inspector” means a person who is certified by the health authority, or other approval agency, to administer a cross connection control program and to conduct cross connection surveys.

(9) “Contamination” means an impairment of the quality of the potable water which creates an actual hazard to the public health through poisoning or through the spread of diseases by sewage, industrial fluids or waste. Also defined as “high hazard.”

(10) “Cross connection” means a point in the plumbing system where the public potable water supply is connected directly, or has the potential of being connected, to a source of nonpotable substance that is not a part of the public potable water supply.

(11) “Double check detector assembly (DCDA)” means an approved assembly consisting of two approved double check valve assemblies, set in parallel, equipped with a meter on the bypass line to detect small amounts of water leakage or use. This unit must be purchased as a complete assembly. The assembly may be allowed on fire line water services in place of an approved double check valve assembly upon approval by the local water authority.

(12) “Double check valve assembly (DCVA)” means an approved assembly consisting of two independently operating check valves, loaded to the closed position by springs or weights, and installed as a unit with, and between, two resilient seated shutoff valves and having suitable connections for testing.

(13) “High hazard” means a physical or toxic hazard which could be detrimental to one’s health.

(14) “Low hazard” means a hazard which could cause aesthetic problems or have a detrimental effect on the quality of the public potable water supply.

(15) “Nonpotable fluid” means any water, other liquid, gas, or other substance that is not safe for human consumption, or is not a part of the public potable water supply as described by the health authority.

(16) “Pollution” means an impairment of the quality of the public potable water supply which does not create a hazard to the public health but which does adversely affect the aesthetic qualities of such potable waters for domestic use. Also defined as “low hazard.”

(17) “Potable water” means water which is safe for human consumption, free from harmful or objectionable materials, as described by the health authority.

(18) “Process water” means water that is directly connected to, or could come in contact with, an extreme high hazard situation, and must never be consumed by humans.

(19) “Pressure vacuum breaker assembly (PVBA)” means an approved assembly consisting of a spring-loaded check valve loaded to the closed position, an independently operating air inlet valve loaded to the open position and installed as a unit with and between two resilient seated shutoff valves and with suitable connections for testing. It is designed to protect against backsiphonage only.

(20) “Reduced pressure backflow assembly (RPBA)” means an approved assembly consisting of two independently operating check valves, spring-loaded to the closed position, separated by a spring-loaded differential pressure relief valve loaded to the open position, and installed as a unit with and between two resilient seated shutoff valves and having suitable connections for testing.

(21) “Reduced pressure detector assembly (RPDA)” means an approved assembly consisting of two approved reduced pressure backflow assemblies, set in parallel, equipped with a meter on the bypass line to detect small amounts of water leakage or use. This unit must be purchased as a complete assembly. The assembly may be allowed on fire line water services in place of an approved reduced pressure backflow assembly upon approval by the city of Electric City. (Ord. 456 § 1, 2012; Ord. 335 § 2, 1998)