| Pipes include but are not limited to: galvanized mild steel (GMS), copper, cross linked polyethylene (PE-X).
Hot water pipe systems are pressure pipes.
Hot water supply systems include but are not limited to: direct, indirect and balanced systems for domestic supply.
Joining of pipes includes but is not limited to: the cutting and threading of galvanized pipes, the joining of similar pipes and the joining of dissimilar pipe types.
Installation of pipes includes but is not limited to: lagging, the fixing and support of pipe work and accommodation for pipe movement.
Fittings include but are not limited to: isolating valves, taps, full way valves, house water stations, thermostatic valves, pressure control valves, mixers, expansion relief valves, vacuum breakers, pressure and temperature safety valves.
Types of hot water cylinders include but are not limited to: combination geysers, push through type, and high pressure geysers, gravity/header tank fed.
Installation of hot water cylinders includes but is not limited to: the drip tray, pressure regulating valves and overflows.
Repairs and replacement to hot water cylinders includes but is not limited to: thermostats, elements, electrical bonding, pressure regulating equipment, safety devices, sacrificial anode.
Plumbing tools include but are not limited to: hand tools (measuring instruments, marking tools, holding tools, cutting tools, fastening, bending and cleaning tools).
Materials include but are not limited to: pipes, fitting, consumables, built-in items, sanitaryware.
Existing services and built-in items that are to be identified and protected include but are not limited to: other plumbing pipes and fittings, fire protection systems, electrical cables, ducts and units, air-conditioning installations, communication ducts or cables, fixtures and fittings.
Industry standards include but are not limited: SANS 10254, SANS 10252 Part 1, related material specifications.
|Names, functions and locations of:
SABS (South African Bureau of Standards).
Purpose of processes and procedures of:
Pressure and how it is expressed and measured, the use of pressure gauges.
The purpose and use of the different types of pipes and pipe materials, including consumables used.
The purpose and use of safety equipment and protective clothing when performing the installation, maintenance and testing of hot water supply systems.
Attributes, properties, characteristics related to:
Types of valves and fittings as listed and their purpose.
The types of tools, equipment and materials used in the installation, maintenance and testing of hot water supply systems, and manufacturers' specifications for the maintenance of tools and equipment and the storage of materials.
Installation of pipes includes bracketing and fabrication of support for pipes within specified tolerances.
Tools, equipment and materials used in the installation of hot water systems, and manufacturers' specifications for the maintenance of tools and equipment and the storage of materials.
Cause and effect, implications of:
Siphon; effects of entrapped air; pressure shocks; water hammer; and flow in pipelines.
The different methods used in joining similar and dissimilar pipe types.
The health implications of working on water supply mains.
Corrosion and the causes and prevention of corrosion, including petrolateum tape wrapping, material selection, and dezincification.
Temperature of water and how it is expressed and measured, as well as the concepts of: thermal expansion, linear/volumetric and freezing point/ice.
Using electrical energy to heat water.
Disconnecting and reconnecting wiring to a hot water cylinder.
Strapping and earthing hot water pipes.
Procedures and techniques:
The disconnection and re-connection of thermostats, elements and wiring on hot water cylinders.
Regulations, legislation, agreements, policies:
National Building Regulations.
Industry standards indicated in the Skills Register for the designated trade of Plumbing.
Occupational Health and Safety Act.
Water Services Act.
Theory - rules, laws, principles:
Occupational Health and Safety Act.
The regulations pertaining to hot water - Water Service Act, National Building Regulations, Codes of Practice and Standards pertaining to Plumbing, including SANS 10252 Part 1 and SANS 10254: The installation, maintenance, replacement and repair of fixed electric storage water heating systems.
The application of basic plumbing principles in the context of hot water supply systems.
Water Services Act.
The different regulations and purpose pertaining to the preservation of water quality, prevention of backflow, and the disinfecting of domestic installations, including the implications of potable water contamination.
Plumb and level.
Relationship between pressure, velocity and flow rates.
Tools and Equipment and Safety.
Notes to Assessors:
Assessors should keep the following general principles in mind when designing and conducting assessments against this unit standard:
Focus the assessment activities on gathering evidence in terms of the main outcome expressed in the title to ensure assessment is integrated rather than fragmented. Remember we want to declare the person competent in terms of the title. Where assessment at title level is unmanageable, then focus assessment around each specific outcome, or groups of specific outcomes. Do not focus the assessment activities on each assessment criterion. Rather make sure the assessment activities focus on outcomes and are sufficient to enable evidence to be gathered around all the assessment criteria.
At this level some errors are to be expected. Assessors must use professional judgement in evaluating competence.
Make sure evidence is gathered across the range as expressed under the title. Specific range statements under individual outcomes or assessment criteria are illustrations, from which learning programme developers can select. Assessment activities should be as close to the real performance as possible, and where simulations or role-plays are used, there should be supporting evidence to show the candidate is able to perform in the real situation.
The task of the assessor is to gather sufficient evidence, of the prescribed type and quality, as specified in this unit standard, that the candidate can achieve the outcomes again and again.
All assessments should be conducted in line with the following well-documented principles: assessment should be appropriate, fair, manageable, integrated into work or learning, valid, and consistent. Evidence should be authentic, sufficient, and current.
Assessment of this standard can be carried out through continuous assessment throughout the course of study and specific performances assessed.
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