AWWA: The American Waterworks Association.
AIR GAP (AG): The unobstructed vertical distance through the free atmosphere between the lowest opening from any pipe or faucet supplying water to a tank, plumbing fixture, or other device and the flood level rim of said vessel. An approved air gap shall be at least double the diameter of the supply pipe, and in no case less than one inch (1") with sidewalls no less than one and one-half inches (11/2"). When an air gap is used at the service connection to prevent the contamination or pollution of a public potable water system, an emergency bypass shall be installed around the air gap system and an approved, reduced pressure principle device shall be installed in the bypass system.
APPROVED: Accepted by the director, or his designated representative, as meeting an applicable specification stated or cited in this chapter, and suitable for the proposed use.
APPROVED ATMOSPHERIC VACUUM BREAKER (AVB) DEVICE: An assembly of bronze body, poppet of molded plastic for use on cold water only, device shall have one only upstream, mainline resilient seat shutoff valve and device shall be installed not less than six inches (6") above the highest outlet on the line.
APPROVED BACKFLOW PREVENTION ASSEMBLY: An assembly that has been manufactured in full conformance with the standards established by the American Waterworks Association (AWWA) entitled: AWWA C506-69, "Standards For Reduced Pressure Principle And Double Check Valve Backflow Prevention Assembly", and have met completely the laboratory and field performance specifications of the Foundation Of Cross Connection Control And Hydraulic Research Of The University Of Southern California (established by the most current specifications of backflow prevention devices).
APPROVED DOUBLE CHECK VALVE (DCV) ASSEMBLY: An assembly of two (2) wye pattern bronze or ductile iron body independently operating internally loaded approved check valves with tightly closing resilient seated gate valves or full port ball valve test cocks for the testing of each check valve. These devices shall be installed a minimum of twelve inches (12") and thirty six inches (36") maximum, aboveground with belowground installation with approval of the city, twelve inches (12") clearance each side and accessible for in line maintenance and testing.
APPROVED DOUBLE DETECTOR CHECK VALVE ASSEMBLY (DDC): An assembly of two (2) wye pattern bodies independently operating internally spring loaded center stem guided type check valves, all internal metals shall be of similar type, bodies shall be of ductile iron, fifteen (15) to twenty (20) mils epoxy coated internally with standard one hundred twenty five (125) pound flanges, two (2) mainline resilient seat shutoff gate valves, four (4) full port ball valve test cocks. Bypass shall consist of one approved double check valve, static pressure drop across the bypass double check valve assembly shall be two (2) psi less than the mainline check valve assembly.
APPROVED PRESSURE VACUUM BREAKER (PVB) DEVICE: An assembly consisting of an all bronze body, canopy, air relief poppet, one internally spring loaded check valve, two (2) mainline resilient seat gate valves or full port ball valves and two (2) ball valve test cocks. Device shall be designed for continuous pressure usage, minimum head loss and serviceable in line. Device shall be installed not less than twelve inches (12") above the highest piping or outlet downstream with twelve inches (12") side clearance.
APPROVED REDUCED PRESSURE PRINCIPLE (RPP) DEVICE: An assembly of two (2) wye pattern bronze or ductile iron body internally spring loaded, center stem guide check valves, internal parts shall be of stainless steel, body fifteen (15) to twenty (20) mils epoxy coated internally, with one differential diaphragm relief valve which shall automatically reduce the pressure in the zone between the two (2) check valves. The device shall operate to maintain the pressure in the zone between the two (2) check valves at a level less than the pressure on the public water supply side of the device. During normal flow, and at cessation of normal flow, the pressure between the two (2) check valves shall be at least two (2) psi less than the upstream supply pressure. In case of leakage of either of the check valves, the differential relief valve shall operate to maintain this reduced pressure by discharging to the atmosphere. The device shall have two (2) mainline shutoff resilient seat gate valves, or full ported ball valves and four (4) ball valve test cocks. These devices shall be installed a minimum of twelve inches (12") and a maximum of thirty six inches (36") aboveground only and twelve inches (12") side clearance.
AUXILIARY WATER SUPPLY: Any water supply on or available to the premises other than the city public potable 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, irrigation canal or pipeline, etc., or "used waters" or "industrial fluids". These waters may be polluted or contaminated or they may be objectionable and constitute an unacceptable water source over which the water purveyor does not have control.
BACKFLOW: A flow condition, induced by a differential in pressure that causes the flow of water or other liquids into the distribution pipes of the city water supply from any source other than its intended source.
BACKFLOW PREVENTER: A device or means designed to prevent backflow or backsiphonage.
BACKPRESSURE: The resulting backflow or contamination, polluted, or otherwise unacceptable quality water from a plumbing fixture or other customer source(s) into the city water supply system due to a greater pressure within the customer's water system.
BACKSIPHONAGE: The flow of water or other liquids, mixtures, or substances into the distributing pipes of the city water supply system from any source other than its intended source caused by the sudden reduction or pressure in the city water supply system.
CONTAMINATION: An impairment of the quality of the city water by sewage, industrial fluids or waste liquids, compounds, or other materials to a degree which creates an actual hazard to the public health through poisoning or through the spread of disease.
CONTROLLED CROSS CONNECTION: A connection between a potable water system and a nonpotable water system with an approved backflow prevention device properly installed that will continuously afford the protection commensurate with the degree of hazard.
CROSS CONNECTION CONTROL BY CONTAINMENT: The installation of an approved backflow prevention device 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 device 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 cross connection.
CUSTOMER: The water user served by the city water system.
CUSTOMER'S WATER SYSTEM:
The piping and parts used to convey water supplied by the city water system throughout the customer's premises, including those parts, facilities, and improvements described in section 8-1-13-4A.
DEGREE OF HAZARD: The evaluation of the potential risk to public health and the adverse effect of hazard upon the city water system as defined herein.
Health Hazard: Any condition, device, or practice in the water supply system and its operation which could create, or in the judgment of the director may create, a danger to the health and well being of the water consumer.
Industrial Fluids System: Any system containing fluid or solution which may be chemically, biologically, or otherwise contaminated or polluted in a form of concentration such as would constitute a health, water system, pollution or plumbing hazard if introduced into an approved water supply. This may include, but not be limited to, polluted or contaminated waters; all types of process waters and "used waters" originating from the city water system which may have deteriorated in sanitary quality; chemicals in fluid form; plating acids; alkalis; circulated cooling tower waters, open or closed, that may be chemically or biologically treated or stabilized with toxic substances; contaminated natural waters such as form wells, springs, streams, irrigation canals; oils; gases; glycerin; caustic and other acid solutions which may be used for industrial and firefighting purposes.
Plumbing Hazard: A cross connection in a consumer's potable water system that has not been properly protected by a vacuum breaker, air gap separation, or backflow prevention device. The term "plumbing hazard" includes, but is not limited to, cross connections to toilets, sinks, lavatories, wash trays, washing machines or lawn sprinkling systems. Unprotected plumbing type cross connections shall be considered to be a health hazard.
Pollution Hazard: An actual or potential threat to the physical properties of the water system or to the potability of the public or consumer's potable water system, but which would constitute a nuisance or be aesthetically objectionable or could cause damage to the system or its appurtenances, but would not be dangerous to public health.
System Hazard: An actual or potential threat of severe damage to the physical properties of the city water system or the consumer's potable water system or of a pollution or contamination which would have a protracted effect on the quality of the potable water in the system.
DIRECTOR: The director of the public works department of the city of Reedley, or his designee.
FIRE MARSHAL: The fire chief of the city of Reedley or state fire marshal, or their designee.
IDENTIFICATION: Each assembly shall have the following information securely attached or embossed on each unit:
A. Manufacturer's name;
B. Size;
C. Model number;
D. Direction of flow, by arrow;
E. Device serial number;
F. Maximum working water pressure (MWWP);
G. Maximum working water temperature (MWWT).
INSTALLATION: Each assembly shall be installed a minimum of twelve inches (12") and a maximum of thirty six inches (36") aboveground, twelve inches (12") side clearance from any structure and as close to the city's meter location as may be possible.
NFPA: The National Fire Protection Association.
POLLUTION: The presence of any foreign substance (organic, inorganic, or biological) in the water which tends to degrade its quality so as to constitute a hazard or impair the usefulness or quality of the water to a degree which does not create an actual hazard to the public health, but which does adversely and unreasonably affect such waters for domestic use.
WATER, NONPOTABLE: "Nonpotable water" means water which is not safe for human consumption or which is of questionable potability.
WATER, POTABLE: "Potable water" means any water which, according to recognized standards, is safe for human consumption.
WATER PURVEYOR, PUBLIC; MUNICIPAL WATER SYSTEM: "Public water purveyor" or "city water system" means the city of Reedley public water system.
WATER SERVICE CONNECTION: The terminal end of a service connection from the city potable water system; i.e., where the water purveyor loses jurisdiction and sanitary control over the water at its point of delivery to the customer's water system. If a meter is installed at the end of the service connection, then the "service connection" shall mean the downstream end of the meter. There should be no unprotected takeoffs from the service line ahead of any meter or backflow prevention device located at the point of delivery to the customer's water system. Service connection shall also include water service connection from a fire hydrant and all other temporary or emergency water service connections from the city potable water system.
WATER, USED:
"Used water" means any water supplied by the city potable water system to a customer's water system after it has passed through the point of delivery and is no longer under the sanitary control of the city. (Ord. 2009-02, 7-28-2009; amd. Ord. 2019-009, 12-10-2019)