The following words and terms, when used in this chapter, have the following meanings, unless the context clearly indicates otherwise.
  (1) Air gap--The unobstructed vertical distance through the free atmosphere between the lowest opening from any pipe or faucet conveying water to a tank, fixture, receptor, sink, or other assembly and the flood level rim of the receptacle. The vertical, physical separation must be at least twice the diameter of the water supply outlet, but never less than 1.0 inch.
  (2) As-built drawing--The final irrigation plan produced at the completion of an irrigation system installation and provided to the irrigation system's owner or the owner's representative. The as-built drawing(s) will reflect all changes made to the original irrigation plan and/or specifications during the construction process and show all aspects of the irrigation system including the dimensions, geometry, and location of all elements of the irrigation system. May be referred to as "record drawings" or "as-builts."
  (3) Backflow prevention--The prevention of the reversal of flow, due to back siphonage or backpressure, of nonpotable water from an irrigation system into the potable water supply.
  (4) Backflow prevention assembly--A mechanical assembly used to prevent backflow into a potable water system. The type of assembly used is based on the degree of hazard (health hazard or non-health hazard) and hydraulic conditions.
  (5) Completion of irrigation system installation--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.
  (6) Consulting--The act of providing advice, guidance, review or recommendations related to landscape irrigation systems.
  (7) Cross-connection--A physical connection between a public water system and either another supply of unknown or questionable quality, any source which may contain contaminating or polluting substances, or any source of water treated to a lesser degree in the treatment process.
  (8) Design--The act of determining the various elements of a landscape irrigation system that will include, but not 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 hydraulic calculations, identifying any local regulatory requirements, or scheduling irrigation work at a site. Completion of the various components will result in an irrigation plan.
  (9) Design pressure--The pressure that is required for an emission device to operate properly and in conjunction with the head-to-head spacing requirement. Design pressure is the sum of the minimum operating pressure of an emission device to the total of all pressure losses accumulated from the emission device to the water source.
  (10) Double Check Valve Assembly--An assembly that is composed of two independently acting, check valves, including tightly closing 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.
  (11) Emission device--Any device that is contained within an irrigation system and that is used to apply water. Common emission devices in an irrigation system include, but are not limited to, spray and rotary sprinkler heads, and drip irrigation emitters.
  (12) Employed--The state of being engaged or hired to provide irrigation services and of being in an employer-employee relationship as defined by Internal Revenue Code, 26 United States Code Service, §3212(d) based on the behavioral control, financial control, and the type of relationship involved in performing employment related tasks.
  (13) Exempt business owner--an owner of a business who employs a licensed irrigator to supervise the irrigation services performed by the business as referenced in Texas Occupations Code, Chapter 1903.
  (14) Graywater--wastewater from showers, bathtubs, handwashing lavatories, sinks that are used for disposal of household or domestic products, sinks that are not used for food preparation or disposal, and clothes-washing machines. Graywater does not include wastewater from the washing of material, including diapers, soiled with human excreta or wastewater that has come into contact with toilet waste.
  (15) Head-to-head spacing--The spacing of emission devices such that the distance between them is within the manufacturer's published radius range and the water spray reaches from device to device. A deviation of 10% or less is acceptable.
  (16) Health hazard--A cross-connection, potential contamination hazard, or other situation involving any substance that can cause death, illness, spread of disease, or has a high probability of causing such effects if introduced into the potable drinking water supply.
  (17) Hydraulics--The science of dynamic and static water; the mathematical computation of pressure losses and/or pressure requirements of an irrigation system.
  (18) Irrigation inspector--A water district operator, governmental entity, or licensed irrigation inspector who inspects irrigation systems and performs other enforcement duties for a municipality or water district and is required to be licensed under Chapter 30 of this title (relating to Occupational Licenses and Registrations) or a licensed plumbing inspector.
  (19) Irrigation plan--A scaled drawing of a new landscape irrigation system to be installed. The irrigation plan shall meet all the requirements in §§344.60 - 344.65 of this title (relating to Water Conservation; Minimum Standards for the Design of the Irrigation Plan; Minimum Design and Installation Requirements; Completion of Irrigation System Installation; Maintenance, Alteration, Repair, or Service of Irrigation Systems; and Reclaimed Water) and is provided as an as-built drawing to the owner or owner's representative upon completion of the irrigation system installation.
  (20) Irrigation services--All activities involving an irrigation system including, selling, designing, installing, maintaining, altering, repairing, servicing, permitting, consulting services, or connecting an irrigation system to a water supply.
  (21) Irrigation system--A system permanently installed on a site and that is composed of an assembly of component parts for the controlled distribution and conservation of water to irrigate, reduce dust, and control erosion in any type of landscape vegetation in any location. This term includes sprinklers and sprinkler systems used for irrigation. This term does not include a system that is used on or by an agricultural operation as defined by Texas Agricultural Code, §251.002.
  (22) Irrigation technician--A person who works under the supervision of a licensed irrigator to perform irrigation services including the connection of an irrigation system to a private or public, raw or potable water supply system or any other water supply, and who is required to be licensed under Chapter 30 of this title (relating to Occupational Licenses and Registrations).
  (23) Irrigation zone--A subdivision of an irrigation system with a matched precipitation rate based on plant type (turf, shrubs, or trees), microclimate (sun/shade ratio), topographic features, soil type (sand, loam, clay, or combination), and hydrological control.
  (24) Irrigator--A person who performs irrigation services and/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, and who is required to be licensed under Chapter 30 of this title (relating to Occupational Licenses and Registrations).
  (25) Irrigator-in-Charge--The irrigator responsible for all irrigation work performed by an exempt business owner, including, but not limited to obtaining permits, developing design plans, supervising the work of other irrigators or irrigation technicians, and installing, selling, maintaining, altering, repairing, or servicing a landscape irrigation system.
  (26) Landscape irrigation--The science of applying the necessary amount of water to promote or sustain healthy growth of plant material or turf.
  (27) License--An occupational license that is issued by the commission under Chapter 30 of this title (relating to Occupational Licenses and Registrations) to an individual that authorizes the individual to engage in an activity that is covered by this chapter.
  (28) Mainline--A pipe within an irrigation system that delivers water from the water source to the individual zone valves.
Cont'd...