Definitions.
The following words and terms, when
used in this division, have the following meanings, unless the context
clearly indicates otherwise:
Air gas.
A complete physical separation between the free-flowing discharge
end of a potable water supply pipeline and an open or nonpressure
receiving vessel.
Atmospheric vacuum breaker.
An assembly containing an air inlet valve, a check seat,
and an air inlet port. The flow of water into the body causes the
air inlet valve to close the air inlet port. When the flow of water
stops the air inlet valve falls and forms a check against backsiphonage.
At the same time it opens the air inlet port allowing air to enter
and satisfy the vacuum. Also known as an "atmospheric vacuum breaker
backsiphonage prevention assembly."
Backflow prevention.
The mechanical prevention of reverse flow, or backsiphonage,
of nonpotable water from an irrigation system into the potable water
source.
Backflow prevention assembly.
Includes any assembly used to prevent backflow into a potable
water system. The type of assembly used is based on the existing or
potential degree of health hazard and backflow condition.
Consulting.
The act of providing advice, guidance, review or recommendations
related to landscape irrigation systems.
Cross connection.
An actual or potential connection between a potable water
source and an irrigation system that may contain contaminates or pollutants
or any source of water that has been treated to a lesser degree in
the treatment process.
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.
Includes 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. Common emission devices in an irrigation
system include, but are 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. A person is
employed if that person is in an employer-employee relationship as
defined by Internal Revenue Code, 26 USC 3212(d) based on the behavioral
control, financial control, and the type of relationship involved
in performing employment related tasks.
Head-to-head spacing.
Includes the spacing of spray or rotary heads equal to the
manufacturer's published radius of the head.
Health hazard.
A cross connection or potential cross connection with an
irrigation system that involves any substance that may, if introduced
into the potable water supply, cause death or illness, spread disease,
or have a high probability of causing such effects.
Hydraulics.
The science of dynamic and static water; the mathematical
computation of determining pressure losses and pressure requirements
of an irrigation system.
Inspector.
A licensed plumbing inspector, water district operator, other
governmental entity, or irrigation inspector who inspects irrigation
systems and performs other enforcement duties for a municipality or
water district as an employee or as a contractor.
Installer.
A person who actually connects an irrigation system to a
private or public raw or potable water supply system or any water
supply, who is licensed according to title 30, Texas Administrative
Code, chapter 30 (relating to occupational licenses and registrations).
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 and is required to be licensed under title 30,
Texas Administrative Code, chapter 30 (relating to occupational licenses
and registrations).
Irrigation plan.
A 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.
Includes the 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 V.T.C.A.,
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, and who is required to be licensed under title 30, Texas
Administrative Code, chapter 30 (relating to occupational licenses
and registrations).
Irrigation zone.
Includes 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, and who is required to be licensed under title 30, Texas Administrative
Code, chapter 30.
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.
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 title 30, Texas Administrative Code,
chapter 30 to an individual that authorizes the individual to engage
in an activity that is covered by title 30, Texas Administrative Code,
chapter 30.
Mainline.
A pipe within an irrigation system that delivers water from
the water source to the individual zone valves.
Maintenance checklist.
A document made available to the irrigation system's
owner or owner's representative that contains information regarding
the operation and maintenance of the irrigation system, including,
but not limited to: checking and repairing the irrigation system,
setting the automatic controller, checking the rain or moisture sensor,
cleaning filters, pruning grass and plants away from irrigation emitters,
using and operating the irrigation system, the precipitation rates
of each irrigation zone within the system, any water conservation
measures currently in effect from the water purveyor, the name of
the water purveyor, a suggested seasonal or monthly watering schedule
based on current evapotranspiration data for the geographic region,
and the minimum water requirements for the plant material in each
zone based on the soil type and plant material where the system is
installed.
Major maintenance, alteration, repair, or service.
Any activity that involves opening to the atmosphere the
irrigation main line at any point prior to the discharge side of any
irrigation zone control valve. This includes, but is not limited to,
repairing or connecting into a main supply pipe, replacing a zone
control valve, or repairing a zone control valve in a manner that
opens the system to the atmosphere.
Master valve.
A remote control valve located after the backflow prevention
device that controls the flow of water to the irrigation system mainline.
New installation.
An irrigation system installed at a location where one did
not previously exist.
Pass-through contract.
A written contract between a contractor or builder and a
licensed irrigator or exempt business owner to perform part or all
of the irrigation services relating to an irrigation system.
Pressure vacuum breaker.
An assembly containing an independently operating internally
loaded check valve and an independently operating loaded air inlet
valve located on the discharge side of the check valve. Also known
as a "pressure vacuum breaker backsiphonage prevention assembly."
Reclaimed water.
Domestic or municipal wastewater which has been treated to
a quality suitable for beneficial use, such as landscape irrigation.
Records of landscape irrigation activities.
The irrigation plans, contracts, warranty information, invoices,
copies of permits, and other documents that relate to the installation,
maintenance, alteration, repair, or service of a landscape irrigation
system.
Reduced pressure principle backflow prevention assembly.
An assembly containing two independently acting approved
check valves together with a hydraulically operating mechanically
independent pressure differential relief valve located between the
two check valves and below the first check valve.
Supervision.
The on-the-job oversight and direction by a licensed irrigator
who is fulfilling his 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 license irrigator to install, maintain, alter,
repair or service an irrigation system.
Water conservation.
The design, installation, service, and operation of an irrigation
system in a manner that prevents the waste of water, promotes the
most efficient use of water, and applies the least amount of water
that is required to maintain healthy individual plant material or
turf, reduce dust, and control erosion.
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.