In this article:
AIR GAP. A complete physical separation between the free flowing discharge end of a potable water supply pipeline and an open or non-pressure receiving vessel.
ALTER (ALTERATION). Any modification of an existing irrigation system where 20% or more of the original system is altered; and/or when additional zones are added to the existing system.
AUTOMATIC CONTROLLER. A solid state timer capable of operating valve stations to set the days, time of day and length of time water is applied.
BACKFLOW PREVENTION. The mechanical prevention of the flow in the direction opposite to the normal flow; or the introduction of any foreign liquids, gases or substances into the public water system.
BACKFLOW PREVENTION ASSEMBLY. An approved assembly to counteract backpressure or prevent backsiphonage. This assembly must appear on the list of approved assemblies issued by the City of Fort Worth water department.
COMPLETION OF IRRIGATION SYSTEM INSTALLATION. The time when the landscape irrigation system has been installed, all minimum standards met, all tests performed and the irrigator is satisfied that the system is operating correctly.
CROSS-CONNECTION. Any physical arrangement where a potable water supply is actually or potentially connected with any non-potable water system, used water system or auxiliary water supply, sewer, drain conduit, swimming pool, storage reservoir, plumbing fixture, swamp cooler, air conditioning unit, fire protection system or any other assembly which contains, or may contain, contaminated water, domestic 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 assemblies, or other temporary or permanent assemblies through which, or because of which, backflow may occur are considered to be CROSS- CONNECTIONS.
DESIGN. The act of determining the various elements of a landscape irrigation system that will include, but not be limited to, elements such as collecting site specific information, defining the scope of the project, defining plant watering needs, selecting and laying out emission devices, locating system components, conducting hydraulics calculations, identifying any local regulatory requirements, or scheduling irrigation work at a site. Completion of the various components will result in an irrigation plan.
DESIGN PRESSURE. The pressure that is required for an emission device to operate properly. DESIGN PRESSURE is calculated by adding the operating pressure necessary at an emission device to the total of all pressure losses accumulated from an emission device to the water source.
DOUBLE CHECK VALVE. An assembly that is composed of two independently acting, approved check valves, including tightly closed resilient seated shutoff valves attached at each end of the assembly and fitted with properly located resilient seated test cocks. Also known as a DOUBLE CHECK VALVE BACKFLOW PREVENTION ASSEMBLY.
EMISSION DEVICE. Any device that is contained within an irrigation system and that is used to apply water including, but not limited to, spray and rotary sprinkler heads, and drip irrigation emitters.
EMPLOYED. Engaged or hired to provide consulting services or perform any activity relating to the sale, design, installation, maintenance, alteration, repair or service to irrigation systems.
IRRIGATION INSPECTOR. A person who inspects irrigation systems and performs other enforcement duties for a municipality or water district as an employee or as a contractor as required under Tex. Administrative Code Title 30, Chapter 30.
IRRIGATION PLAN. Scaled drawing of a landscape irrigation system which lists required information, the scope of the project, and represents the changes made in the installation of the irrigation system.
IRRIGATION SERVICES. Selling, designing, installing, maintaining, altering, repairing, servicing, permitting, providing consulting services regarding, or connecting an irrigation system to a water supply.
IRRIGATION SYSTEM. An assembly of component parts that is permanently installed for the controlled distribution and conservation of water to irrigate any type of landscape vegetation in any location, and/or to reduce dust or control erosion. This term does not include a system that is used on or by an agricultural operation as defined by Tex. Agricultural Code § 251.002.
IRRIGATION TECHNICIAN. A person who works under the supervision of a licensed irrigator to install, maintain, alter, repair, service or supervise installation of an irrigation system, including the connection of such system in or to a private or public, raw or potable water supply system or any water supply as required under Tex. Administrative Code Title 30, Chapter 30.
IRRIGATION ZONE. A subdivision of an irrigation system with a matched precipitation rate based on plant material type (such as turf, shrubs or trees), microclimate factors (such as sun/shade ratio), topographic features (such as slope) and soil conditions (such as sand, loam, clay or combination) or for hydrological control.
IRRIGATOR. A person who sells, designs, offers consultations regarding, installs, maintains, alters, repairs, services or supervises the installation of an irrigation system, including the connection of such system to a private or public, raw or potable water supply system or any water supply, required to be licensed under Tex. Administrative Code Title 30, Chapter 30.
LANDSCAPE IRRIGATION. The science of applying the necessary amount of water to promote or sustain healthy growth of plant material or turf.
LICENSE. An occupational license that is issued by the Texas commission on environmental quality under Tex. Administrative Code Title 30, Chapter 30.
MAINLINE. A pipe within an irrigation system that delivers water from the water source to the individual zone valves.
MASTER VALVE. A remote control valve located after the backflow prevention device that controls the flow of water to the irrigation system mainline.
MATCHED PRECIPITATION RATE. The condition in which all sprinkler heads within an irrigation zone apply water at the same rate.
NEW INSTALLATION. An irrigation system installed at a location where one did not previously exist.
POTABLE WATER. Water that is suitable for human consumption.
RECLAIMED WATER. Reclaimed water that is collected through a publicly owned treatment works and is under the direct control of the city wastewater treatment plants or a wastewater treatment plant with which the city contracts, and that has been treated to a quality that meets or exceeds Chapter 210 requirements of Tex. Administrative Code Title 30.
SUPERVISION. The on-the-job oversight and direction by a licensed irrigator who is fulfilling his or her professional responsibility to the client and/or employer in compliance with local or state requirements. Also a licensed installer working under the direction of a licensed irrigator or beginning January 1, 2009, an irrigation technician who is working under the direction of a licensed irrigator to install, maintain, alter, repair or service an irrigation system.
ZONE FLOW. A measurement, in gallons per minute or gallons per hour, of the actual flow of water through a zone valve, calculated by individually opening each zone valve and obtaining a valid reading after the pressure has stabilized. For design purposes, the ZONE FLOW is the total flow of all nozzles in the zone at a specific pressure.
ZONE VALVE. An automatic valve that controls a single zone of a landscape irrigation system.
(Ord. 18444-01-2009, § 1, passed 1-13-2009)