For the purpose of this chapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
AIR GAP. An unobstructed vertical distance through atmosphere between the discharge end of a pipeline supplied from a public water supply and the overflow rim of the receiving portion of the customer water system.
BACKFLOW. The flow of water or contaminants into the public water supply distribution system from a source other than the public water supply.
BOOSTER PUMP. A pump installed on a pipeline to increase water pressure or flow.
COMMISSIONER. The Commissioner of the state’s Department of Environmental Management (IDEM), or the Commissioner’s authorized representative.
CROSS-CONNECTION. Any physical arrangement, including cross-connection control devices not in working order, whereby a public water supply distribution system is directly connected, either continuously or intermittently, with any secondary source of supply, sewer, drain, conduit, pool, piping, storage reservoir, plumbing fixture or other device which contains, or may contain, and is capable of imparting to the public water supply, contaminants, contaminated water, sewage or other waste or liquid of unknown or unsafe quality.
CROSS-CONNECTION CONTROL DEVICE. Any device or assembly, approved by the Commissioner for construction on or installation in water supply piping, which is capable of preventing contaminants from entering the public water supply distribution system.
CROSS-CONNECTION CONTROL DEVICE INSPECTOR. A person who has:
(1) Successfully completed training in testing and inspection of cross-connection control devices from a training provider approved by the Commissioner;
(2) Received a registration number from the Commissioner; and
(3) Not been notified by the Commissioner that the registration number has been revoked.
CROSS-CONNECTION HAZARD. Any customer facility which, because of the nature and extent of activities on the premises or the materials used in connection with the activities or stored on the premises, would present an immediate or potential danger or health hazard to customers of the public water supply should backflow occur.
CUSTOMER. Any person, trust, firm or corporation who receives water from the town’s waterworks public water supply.
CUSTOMER SERVICE LINE. The pipeline from the public water supply to the:
(1) First tap, fixture, receptacle or other point of customer water use; or
(2) Secondary source of supply or pipeline branch in a building.
CUSTOMER WATER SYSTEM. All piping, fixtures and appurtenances, including secondary sources of supply, used by a customer to convey water on his or her premises.
DOUBLE CHECK VALVE ASSEMBLY. A device or assembly composed of two tightly-closing shut-off valves surrounding two independently acting check valves, with four test cocks, one upstream of the four valves and one between each of the four check and shut-off valves.
DOWNSTREAM. The direction of flow when only the public water supply is supplying water through the customer water system and backflow is not occurring.
PRESSURE VACUUM BREAKER. A device or assembly containing an independently operating internally loaded check valve and an independently operating loaded air inlet valve located on the downstream side of the check valve for relieving a vacuum or partial vacuum in a pipeline.
PRIVATE WATER SUPPLY SYSTEM. The lateral fire and service line to the customer’s premises starting at the roundway (buffalo box) on the service line and terminating at the point of usage, whether for fire suppression, irrigation or domestic usage.
PUBLIC WATER SUPPLY SYSTEM. A public water supply for the provision to the public of water for human consumption through pipes or other constructed conveyances and shall consist of the water mains and appurtenances such as fire hydrants and main valves used to distribute the potable water supply to the public, and shall terminate at the roundway (buffalo box) for lateral service to the user. The town’s waterworks municipal utility is the owner of the PUBLIC WATER SYSTEM.
REDUCED PRESSURE PRINCIPLE BACKFLOW PREVENTER. A device composed of two tightly-closing shut-off valves surrounding two independently acting pressure reducing check valves that, in turn, surround an automatic pressure differential relief valve, and four test cocks, one upstream of the five valves and one between each of the four check and shut-off valves. The check valves effectively divide the structure into three chambers; pressure is reduced in each downstream chamber allowing the pressure differential relief valve to vent the center chamber to atmosphere should either or both check valves malfunction.
SECONDARY SOURCE OF SUPPLY. Any well, spring, cistern, lake, stream or other water source, intake structure, pumps, piping, treatment units, tanks and appurtenances used, either continuously or intermittently, to supply water other than from the public water supply to the customer, including tanks used to store water to be used only for firefighting, even though the water contained therein is supplied from the public water supply.
UPSTREAM. The direction of flow opposite to downstream.
UTILITY. The Town of Centerville Waterworks, a municipally-owned utility governed by the Town Council.
(Ord. 2018-13, passed 8-13-2018)