Elements and Performance Criteria

includes:
interpretation of plans and specifications
sizing and documenting layout of complex sanitary plumbing and drainage systems for applications, including residential, commercial and industrial
may be for:
existing structure being renovated, extended, restored or maintained
new projects.

architectural specifications
builder specifications
owner requirements
specialist water use applications.

comparison of range of suitable materials and system choices available to enable cost-effective choices to be made without compromising integrity of the project.

Acts and regulations
local and state government policies.

AS/NZS3500 National plumbing and drainage set: Parts 1.1 and 1.2
AS2200 Design charts for water supply and sewerage
Building Code of Australia.

material specifications
pump tables
sizing tables
technical and trade manuals.

flow, velocity, pressure and discharge requirements, established using Australian and New Zealand standards and local authority plans.

dual feed
ring main
single pipe.

fittings:
bends
elbows
tees
unions
valves:
backflow prevention
excess pressure
isolating
pressure limiting
pressure reduction
strainers.

benching requirements
connections to and from
flow
gradient requirements
inspection chambers
lids
open and closed channel
sizing.

boundary traps
disconnector gullies (DG)
overflow relief gullies (ORG).

determination of flow and fixture loadings
gradient calculations
interpretation of design charts and tables
pipe sizing calculations
reduced level calculations.

flow forces to be resisted
keying and anchorage points
sizes
soil characteristics.

anchors
bedding
bracket spacing
concrete support
corrosion protection
cover
hanging brackets
material requirements
saddles
wall and ceiling brackets.

automatic controls
capacity
chains
corrosion-resistant materials
detailing
high and low-level water controls and alarms
impeller sizing
inlet and outlet design requirements
installation and mounting requirements
ladder access
macerator requirements
pump selection
pump sizing
pumpwell sizing
space requirements
step irons
valve requirements
warning system.

cast iron
concrete
copper
earthenware
high density polyethylene (HDPE)
unplasticised polyvinyl chloride (uPVC)
fittings and fixtures, including:
measures to prevent the spread of fire
sound attenuation requirements.

brazing and threading
gluing
mechanical joints
rubber ring
solvent cement welding.

bedding
clipping
concrete support
installation details
jointing requirements
level of workmanship.

approved pressure pipe and fittings
calculated rise and pump delivery requirements
pump sizing to meet calculated flow conditions.

may include:
axonometrics
cross-sections
details
elevations
isometrics
schematics
sections
may be produced using:
computer generation
Indian ink
pencil
pigment liner.

bedding
clipping
concrete support and detailing specialised components
jointing
manholes
manufacturer requirements
materials
workmanship.

air pressure test
drainage inspection
hydrostatic test
quality assurance (QA) audit.

charging traps
checking leaks
cleaning grates.

check for blockages
leak detection
pump maintenance
water auditing
yearly inspection
yearly maintenance requirements.

Overview of assessment
This unit of competency could be assessed in the workplace or a close simulation of the workplace environment providing that simulated or project-based assessment techniques fully replicate plumbing and services workplace conditions, materials, activities, responsibilities and procedures.
It may be assessed on its own or as part of an integrated assessment activity involving carrying out the effective performance and application of drainage principles and detailing system components used in the drainage industry.

Critical aspects for assessment and evidence required to demonstrate competency in this unit

A person who demonstrates competency in this unit must be able to provide evidence of:

evaluating and documenting design parameters, including client, regulatory, manufacturer and Australian and New Zealand standard requirements for a range of complex sanitary plumbing and drainage systems

planning and detailing system components, including:

manholes
gullies
anchorage blocks
pumpwells
piping systems
designing and sizing a complex sanitary plumbing and drainage system
applying drainage principles in the design and sizing of a complex elevated pipe system
designing and sizing a rising main
designing and sizing a fully vented or fully vented modified system
designing and sizing a single stack or single stack modified system
preparing plans to industry standards for a range of complex sanitary plumbing and drainage systems
preparing a specification for a complex sanitary plumbing and drainage system
preparing a testing and commissioning schedule
preparing an operation and maintenance manual
complying with OHS regulations applicable to workplace operations
interactive communication with others to ensure safe and effective workplace operations.

Context of and specific resources for assessment
This competency is to be assessed using standard and authorised work practices, safety requirements and environmental constraints.
Assessment of essential underpinning knowledge will usually be conducted in an off-site context.
Assessment is to comply with relevant regulatory or Australian standards' requirements.

Resource implications for assessment include:

an induction procedure and requirement
realistic tasks or simulated tasks covering the mandatory task requirements
relevant specifications and work instructions
tools and equipment appropriate to applying safe work practices
support materials appropriate to activity
workplace instructions relating to safe working practices and addressing hazards and emergencies
material safety data sheets
research resources, including industry related systems information.
Reasonable adjustments for people with disabilities must be made to assessment processes where required. This could include access to modified equipment and other physical resources, and the provision of appropriate assessment support.

Method of assessment

Assessment methods must:

satisfy the endorsed Assessment Guidelines of the Construction, Plumbing and Services Integrated Framework Training Package
include direct observation of tasks in real or simulated work conditions, with questioning to confirm the ability to consistently identify and correctly interpret the essential underpinning knowledge required for practical application
reinforce the integration of employability skills with workplace tasks and job roles
confirm that competency is verified and able to be transferred to other circumstances and environments.

Validity and sufficiency of evidence requires that:

competency will need to be demonstrated over a period of time reflecting the scope of the role and the practical requirements of the workplace
where the assessment is part of a structured learning experience the evidence collected must relate to a number of performances assessed at different points in time and separated by further learning and practice, with a decision on competency only taken at the point when the assessor has complete confidence in the person's demonstrated ability and applied knowledge
all assessment that is part of a structured learning experience must include a combination of direct, indirect and supplementary evidence.
Assessment processes and techniques should as far as is practical take into account the language, literacy and numeracy capacity of the candidate in relation to the competency being assessed.
Supplementary evidence of competency may be obtained from relevant authenticated documentation from third parties, such as existing supervisors, team leaders or specialist training staff.