19215 version 3
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Describe wastewater systems and materials, and causes and prevention
of pipe failure
Level
3
Credits
6
Purpose
People credited with this unit standard are able to describe: the features,
handling, performance, and use of wastewater pipes; the components and
features of wastewater systems; the features of property service connections
to a wastewater drainage system; and causes, and methods for prevention,
of failure of wastewater pipes.
This unit standard is for people who work in wastewater reticulation systems.
Subfield
Water Industry
Domain
Water Reticulation
Status
Registered
Status date
19 September 2008
Date version published
19 September 2008
Planned review date
31 December 2013
Entry information
Open.
Accreditation
Evaluation of documentation by NZQA and industry.
Standard setting body (SSB)
Primary Industry Training Organisation
Accreditation and Moderation Action Plan (AMAP) reference
0179
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Special notes
Definition
Wastewater includes stormwater and sewage systems.
 New Zealand Qualifications Authority 2016
19215 version 3
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Elements and performance criteria
Element 1
Describe the features, handling, performance, and use of wastewater pipes.
Performance criteria
1.1
Brick wastewater pipes are described in terms of their features, handling
vulnerability, performance in the ground, and applications and limitations of use.
Range
1.2
Concrete wastewater pipes are described in terms of their features, handling
vulnerability, performance in the ground, and pressure rating.
Range
1.3
features – rubber ring joints, compression joints, fittings, pipe
classes and specification;
materials – PVC, ABS.
Polyethylene wastewater pipes are described in terms of their features,
materials, handling vulnerability, performance in the ground, and pressure
rating.
Range
1.7
features – fittings, pipe classes and specification, ‘supertite’ joints,
rubber ring joints, compression joints.
Plastic wastewater pipes are described in terms of their features, materials,
handling vulnerability, performance in the ground, and pressure rating.
Range
1.6
features – lead joints, rubber ring joints, connecting fittings.
Asbestos cement wastewater pipes are described in terms of their features,
handling vulnerability, performance in the ground, and pressure rating.
Range
1.5
features – circular sections, oval sections, connecting structures,
rubber ring joints, pipe classes and specification.
Cast iron wastewater pipes are described in terms of their features, handling
vulnerability, performance in the ground, and pressure rating.
Range
1.4
features – circular sections, oval sections, connecting structures.
features – fusion, compression, butt welding.
Ceramic wastewater pipes are described in terms of their features, handling
vulnerability, and performance in the ground.
Range
features – connecting fittings, pipe specifications.
 New Zealand Qualifications Authority 2016
19215 version 3
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1.8
Concrete lined steel wastewater pipes are described in terms of their features,
handling vulnerability, performance in the ground, and pressure rating.
Range
1.9
features – outside diameters, mechanical friction joints, rubber ring
joints, welded joints, flexible couplings.
Glass reinforced plastic wastewater pipes are described in terms of their
features, materials, handling vulnerability, performance in the ground, and
pressure rating.
Element 2
Describe the components and features of wastewater systems.
Performance criteria
2.1
Access chambers are described in terms of the components and their features.
Range
2.2
Lamp holes or rodding eyes are described in terms of their components and
features.
Range
2.3
access chamber types include but are not limited to – in-line, ‘Y’,
‘T’, drop;
components – base units, precast sections, ‘knock-out’ sections,
frames, covers, levels, step irons, ladders, gratings and landings,
other hardware, benching materials;
features – mortar and similar materials, surface finishes, spacing,
water tightness, differential settlement.
components – frames, covers;
features – pipe materials, alignments, levels, spacing.
Sewer ventilation fittings are described in terms of the components and their
features.
Range
components include but are not limited to – water traps;
features – property ventilation, reticulation ventilation.
Element 3
Describe the features of property service connections to a wastewater drainage system.
Range
features – pipe diameters and specification, jointing techniques, sewer jointing
saddles, inspection points and fittings, junctions, ventilation.
Performance criteria
3.1
Earthenware service connections are described in terms of their features.
3.2
PVC service connections are described in terms of their features.
 New Zealand Qualifications Authority 2016
19215 version 3
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3.3
Pumped service connections are described in terms of their features.
Element 4
Describe causes, and methods for prevention, of failure of wastewater pipes.
Performance criteria
4.1
Wastewater pipes are described in terms of the external and internal factors,
and pipe features, which cause failure.
Range
4.2
external factors include but are not limited to – ground conditions,
external loading, environmental (slips, earthquake), root intrusion,
accidental damage, poor installation;
internal factors include but are not limited to – effluent quality,
water pressure, water hammer (shock loading), air in the system,
excessive build-up of solid matter, excessive inflow/infiltration into
wastewater pipes;
wastewater pipe features include but are not limited to – material,
type, condition.
Wastewater pipes are described in terms of the factors which prevent failure.
Range
includes but is not limited to – workmanship, corrosion prevention,
material selection, compatibility of materials, loading, external
protection measures, flexible jointing and join location, pressure
rating and allowance for cycle pressure fluctuations, materials
handling and storage.
Please note
Providers must be accredited by NZQA, or an inter-institutional body with delegated
authority for quality assurance, before they can report credits from assessment against
unit standards or deliver courses of study leading to that assessment.
Industry Training Organisations must be accredited by NZQA before they can register
credits from assessment against unit standards.
Accredited providers and Industry Training Organisations assessing against unit standards
must engage with the moderation system that applies to those standards.
Accreditation requirements and an outline of the moderation system that applies to this
standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The
AMAP also includes useful information about special requirements for organisations
wishing to develop education and training programmes, such as minimum qualifications for
tutors and assessors, and special resource requirements.
Comments on this unit standard
Please contact the Primary Industry Training Organisation standards@primaryito.ac.nz if
you wish to suggest changes to the content of this unit standard.
 New Zealand Qualifications Authority 2016