§ 26-84. Definitions.

APPROVED BACKFLOW ASSEMBLY

Accepted by the State Department of Health, Allegheny County Health Department, as meeting an applicable specification or as suitable for the proposed use.

AUXILIARY WATER SUPPLY

Any water supply on or available to the premises other than the purveyor's public water supply will be considered as an auxiliary water supply. These auxiliary waters may include water from another purveyor's public potable water supply or any natural source(s) such as a well, spring, river, stream, harbor, etc., or "used waters" or "industrial fluids." These waters may be contaminated or polluted or they may be objectionable and constitute an unacceptable water source over which the water purveyor does not have authority for sanitary control.

BACK-PRESSURE

The flow of water or other liquids, mixtures or substances under pressure into the feeding distribution pipes of a potable water supply system from any source(s) other than the intended source.

BACKSIPHONAGE

The flow of water or other liquids, mixtures or substances into the distribution pipes of a potable water supply system from any source(s) other than the intended source, caused by the reduction of pressure in the potable water supply system.

BACKFLOW

The reversal of the normal flow of water caused by either back-pressure or backsiphonage.

BACKFLOW PREVENTION ASSEMBLY

An assembly or means designed to prevent backflow. Specifications for backflow prevention assemblies are contained within the Local Plumbing Code and the Backflow Prevention Program approved by the state.

CONTAMINATION

A degradation of the quality of the potable water supply by sewage, industrial fluids or waste liquids, compounds or other materials.

CROSS CONNECTION

Any physical connection or arrangement of piping or fixtures which may allow nonpotable water or industrial fluids or other material of questionable quality to come in contact with potable water inside a distribution system. This would include any temporary connections, such as swing connections, removable sections, four way plug valves, spools, dummy section of pipe, swivel or change-over devices or sliding multiport tubes or other plumbing arrangement.

CROSS CONNECTION-CONTAINMENT

The installation of an approved backflow assembly at the water service connection to any customer's premises where it is physically and economically infeasible to find and permanently eliminate or control all actual or potential cross connections within the customer's water system; or, it shall mean the installation of an approved backflow prevention assembly on the service line leading to and supplying a portion of a customer's water system where there are actual or potential cross connections which cannot be effectively eliminated or controlled at the point of the cross connection (isolation).

CROSS CONNECTION-CONTROLLED

A. 

A connection between a potable water system and a nonpotable water system with an approved backflow prevention assembly properly installed and maintained so that it will continuously afford the protection commensurate with the degree of hazard.

B. 

Whenever the public water purveyor deems a service connection's water usage contributes a sufficient hazard to the water supply, an approved backflow prevention assembly shall be installed on the service line of the identified consumer's water system, at or near the property line, or immediately inside the building being served; but, in all cases, before the first branch line leading off the service line. The type of protective assembly required shall depend upon the degree of hazard which exists at the point of cross connection (whether direct or indirect), applicable to local and state requirements or resulting from the required survey. All presently installed backflow prevention assemblies which do not meet the requirements of this section but were approved assemblies for the purposes described herein at the time of installation and which have been properly maintained shall, except for the inspection and maintenance requirements be excluded from the requirements of these rules so long as the water purveyor is assured that they will satisfactorily protect the public water system. Whenever the existing assembly is moved from the present location or, requires more than the minimum maintenance or, when the water purveyor finds that the operation or maintenance of this assembly constitutes a hazard to health, the unit shall be replaced by an approved backflow prevention assembly meeting the local and state requirements. It shall be the responsibility of the consumer at any premises where backflow prevention assemblies are installed to have certified surveys/inspections, and operational tests made at least once per year at the consumer's expense. In those instances where the Public Water Purveyor deems the hazard to be great, he may require certified surveys/inspections and tests at a more frequent interval. It shall be the duty of the public water purveyor to see that these tests are made according to the standards set forth by the State Department of Health, Allegheny County Health Department.

WATER PURVEYOR

The person designated to be in charge of the Water Department of the Borough of Aspinwall is invested with the authority and responsibility for the implementation of an effective backflow prevention program and for the enforcement of the provisions of this Part.

Ord. 909, 7/13/1995, § 2