Cpcpsn3022a - Install Discharge Pipes

CPCPSN3022A - INSTALL DISCHARGE PIPES

CONSTRUCTION, PLUMBING AND SERVICE

INTEGRATED FRAMEWORK

TRAINING PACKAGE

CPC08

CPCPSN3022A

INSTALL DISCHARGE PIPES

LEARNING GUIDE

ACKNOWLEDGEMENTS

National Plumbing Services Training Advisory Group

Plumbing Industry Commission Victoria

© Commonwealth of Australia 2015

Construction and Property Services Industry Skills Council

PO Box 151

Belconnen ACT 2616

Tel: 02 6253 0002

This work is copyright, but permission is given to trainers and teachers to make copies and contextualise the resources for use within their own training organisation or in a workplace where training is being conducted. This permission does not extend to making copies for use outside the immediate training environment for which they are made, or the making of copies for hire or resale to third parties.

This work was first published in 2004 with the assistance of funding provided by the Commonwealth Government through the Australian National Training Authority (ANTA). The2015 publication has been updated to reflect changes to the national units of competency.

The views expressed in this work do not necessarily represent the views of the Commonwealth of Australia or CPSISC. In addition, the Commonwealth of Australia and CPSISC do not give warranty or accept any legal liability in relation to the content of this work.

The website addresses and other contact information provided in this publication were compiled in good faith and were correct at the time of printing.

The updating of these resources was completed by:

National Plumbing and Services Training Advisory Group, with funding and support provided by the Construction and Property Services Industry Skills Council (CPSISC):

This guide was developed in consultation with representatives of the Plumbing Industry by NPSTAG and CPSISC to support the implementation of the CPC08 Construction, Plumbing and Services Training Package.

Contents

What is this resource about?......

How do I use this resource?......

Flexible Delivery......

What do I have to do?......

Unit Descriptor......

Element......

Performance Criteria......

Required knowledge...... 5

How will I be assessed?......

What other resources will I need?......

Safety......

Workplace environment and safety......

Introduction......

Factors affecting selection and use of materials......

Regulations......

Quality assurance......

Prepare for work......

Identify installation requirements......

Positioning of pipes......

Determine and transfer allowances......

Ordering materials......

Install and test pipe system......

Tools and equipment......

Testing the pipe system......

Clean up......

Tools and equipment......

Worksheet......

Practical application......

Assessment checklist......

CPCPSN3022A - INSTALL DISCHARGE PIPES

What is this resource about?

Welcome to CPCPSN3022AInstall discharge pipes. This resource will help you gain the skills and knowledge necessary to demonstrate competence in this unit.

How do I use this resource?

This resource is divided into four main sections:

A learning unit, which contains background information on CPCPSN3022A - Install discharge pipes
Worksheets, which prepare you for the practical application
Practical application, which allows you to experience Installing discharge pipes
Assessment materials, which help you demonstrate competency.

To complete this unit of competence you will need to:

read the information contained in the learning unit
complete the worksheets as instructed
have your answers checked by your trainer or supervisor
work with your trainer or supervisor to practise Installing discharge pipes
read the assessment checklist together with the assessment sheets
complete the assessment.

Learning Resources are not intended to be the only source of information nor are they intended to be an exhaustive form of instruction.

Flexible Delivery

The Trainer or Supervisor may adapt and deliver this Learning Resource to suit people from diverse backgrounds to meet equity principles and conform to Legislative policies.

What do I have to do?

To demonstrate competence in this unit you will be required to show the level of skills and knowledge for each of the elements involved in CPCPSN3022A Install discharge pipes.

. The elements are:

Prepare for work
Determine installation requirements
Install and test pipe system
Clean up.

If you are unsure of the meaning of these elements you should read the performance criteria on the following page.

CPCPSN3022A / Install discharge pipes
Unit Descriptor / This unit of competency specifies the outcomes required to install pipework from soil and wastewater fixtures to a stack or drain.
Element / Performance Criteria
Elements define the essential outcomes of a unit of competency. / Performance criteria describe the required performance needed to demonstrate achievement of the element. Where bold italicised text is used, further information is detailed in the required skills and knowledge and/or the range statement. Assessment of performance is to be consistent with the evidence guide.
1Prepare for work / Plans and specifications are obtained and fixture position is determined
Work health and safety (WHS) andenvironmental requirements associated with installing sewage discharge pipes are adhered to throughout the work
Quality assurance requirements are identified and adhered to according to workplace requirements
Tasks are planned and sequenced in conjunction with others involved in or affected by the work and statutory and regulatory authorities’ requirements
Tools and equipmentfor installing sewage discharge pipes, including personal protective equipment, are selected and checked for serviceability
Work area is prepared to support efficient installation of sewage discharge pipes
2Identify installation requirements / 2.1Position of discharge pipes is determined according to plans and specifications, relevant Australian standards, site requirements and other relevant information and does not cause damage or interference to surrounding structures
2.2Quantity and type of materials required are calculated from design drawings and specifications and comply with relevant Australian standards and authorities' requirements
2.3Allowances for fabrication and assembly are determined and transferred
2.4Materials and equipment are identified, ordered and collected according to workplace procedures
2.5Materials and equipment are checked for compliance with relevant Australian standards, docket and order forms, and for acceptable condition
2.6Sustainability principles and concepts are observed when preparing for and undertaking work process
3Install and test pipe system / 3.1Pipe systemis set out to comply with plans, specifications and relevant Australian standards
3.2Fixings and supports are installed to manufacturer recommendations, job plans and specifications, and relevant Australian standards
3.3Pipes are installed and jointed according to relevant Australian standards, without damage or distortion to pipework, surrounding environment and other services
3.4Pipe system is tested to comply with relevant Australian standards and adjusted
4Clean up / 4.1Work area is cleared and materials disposed of, reused or recycled according to legislation, regulations, codes of practice and job specification
4.2Tools and equipment are cleaned, checked, maintained and stored according to manufacturer recommendations and workplace procedures
4.3Documentation is completed according to workplace requirements

Required knowledge

/ Required knowledge for this unit is:

characteristics and application of different materials, pipe fittings and supports, including fixing and joining techniques
job safety analysis (JSA) and safe work method statements (SWMS)
levelling and alignment processes
process of installing sewage discharge pipes
processes for accessing information and for calculating material requirements
properties and characteristics of sewage, including temperature implications and discharges
relevant statutory requirements related to installing discharge pipes
SI system of measurements
standards applicable to the installation

workplace and equipment safety requirements

An up to date version of the ‘Unit Descriptor’ may be located on the Australian Government web site training.gov.au

How will I be assessed?

Your trainer or supervisor will decide with you how you will be assessed. Your assessment activity may include completion of the student worksheet and practical task selected by your trainer or supervisor. Your assessment should allow you to demonstrate all the skills and knowledge required to install discharge pipes.

This unit may be assessed in conjunction with other units of competence. Your trainer or supervisor will tell you if you are to be assessed this way.

Are there any pre-requisites?

Prior to commencing CPCPSN3022A - Install discharge pipes you must have successfully completed the following pre-requisites:

CPCPCM2003A Carry out WHS requirements

It is also recommended that prior to commencing CPCPSN3022A - Install discharge pipes you should have successfully completed the following competencies:

CPCPCM2040A Read plans and calculate plumbing quantities
CPCPSN3023A Fabricate and install sanitary stacks
CPCPSN3024A Install and fit off sanitary fixtures

Project work may also group pre-requisite and or co-requisite competencies together to carry out such projects. It is recommended that the following competencies are grouped with this unit of competency:

What other resources will I need?

To assist you the following resources have been suggested and should be available to you to do this competency:

Texts

AS/NZS3500 - Plumbing and drainage.
Plumbing code of Australia.
State or Territory regulations may override this Learning Guide.

Web sites

Video or audio cassettes

In addition, manufacturers’ catalogues and instructions are worthwhile sources of information. Your work plans and specifications are also a valuable resource.

Safety

Workplace health and safety (WHS) requirements need to be observed in accordance with legislation. You need to know the WHS laws governing your job. Revision of CPCPCM2043A – Carry out WHS requirements, before commencing this unit is advisable.

In any work situation you can reduce the risk of injury to yourself and others by using appropriate personal protective equipment (PPE). The types of PPE that you will need include:

overalls – used for the protection of the installer when working in different conditions
boots – it is recommended that soft soled footwear is worn while working on roofs, as deep grooved footwear pick up small stones and debris that might damage or scratch the roof sheets
safety glasses or goggles to protect the eyes from injury when cutting the sheets with a power saw
ear plugs or muffs to protect the installer’s hearing from excessive noise
dust masks or respirators to protect the user from breathing in dust or fine particles when cutting the sheets with a power saw
gloves, for the protection of the installer’s hands when working with different types of pipes, tools and equipment.

Workplace environment and safety

Handling of materials / Manual lifting and handling techniques must always be followed according to WHS requirements. You should move materials into position by hand where possible. Excessive manual handling should be avoided and cranes and other mechanical lifting devices should be employed when necessary.
Limited height scaffolds and elevating work platforms (EWP) / Operators must ensure they are familiar with all operating procedures detailed by manufacturers in the elevated working platforms operators’ manual. Personal protective equipment must be worn at all times by the person working in the basket of the EWP. This consists of safety harnesses, safety helmets, rubber soled shoes, safety vests and suitable clothing.

Introduction

In this unit you will look at installing pipework from sanitary fixtures for connection to a sewer, common effluent system or on-site disposal system. This pipework will carry sewage and or waste water from a fixture or floor waste gully to a stack or a sanitary drain.

The installation of the discharge pipe from a fixture may be carried out at different stages of the job. Generally the discharge pipe from a fixture will be installed before or after the installation of the fixture, but may also be a combination of both.

Depending on the circumstances it may be necessary to install the discharge pipe before the fixture has even been installed. This may be due to different reasons, the most common being that the pipe needs to be hidden from view and therefore installed within the wall or under a floor. In some instances it may be considered a better option if the pipe is installed after the fixture has been installed. You will have a clearer view of what is to be connected if the pipes don’t need to be hidden from view.

Factors affecting selection and use of materials

Materials used for discharge pipes and fixings must comply with AS/NZS3500.2 – Sanitary plumbing and drainage – acceptable solutions. You can select materials for a given application directly from the Australian Standard. In addition you will need to select appropriate fixings and supports from manufacturers’ catalogues. Fixings and supports must be in accordance with the job plans and specifications.

A number of factors will determine what materials you should select for a given job and how you will use them. These factors include:

type of usage
class of discharge (eg soil or waste)
properties of liquids conveyed
soil type and condition
environmental factors
temperature
characteristics of materials and products.

Let’s take a closer look at how and why each factor might influence your decision.

Type of usage

Discharge pipes are used to convey many different types of waste products, therefore they may be found in all types of situations. They may discharge anything from water hosed down from an abattoir floor, to a stack used to convey discharge from a multi storey building, as well as the discharge from the kitchen sink. This means that pipes can be found under floors, in walls, ceilings and hidden within ducts.

Properties of liquids conveyed

A variety of liquids can travel through discharge pipes. These include:

Household wastes from kitchen, bathroom, laundry, toilet etc are generally considered accepted wastes into sanitary sewers.
Discharges such as acids, grease, fats, dirt, and oil are usually considered to be “trade” wastes and require special approvals.

Soil type and condition

If a discharge pipe is to be laid in the ground, it is worth considering the type of soil in which the pipe will be placed. Some pipe materials and types of soil should not come in contact with each other. The selection of the correct pipe material to be used will determine whether the pipe is to last a long time or a short time, due to the effects of corrosion. Some soils may be far to acidic, alkaline, or contain too much salt for certain types of pipes.

Environmental factors

When choosing an appropriate pipe material for a job, the environment in which the pipe will be used, should be considered. For example: the cost effectiveness, the longevity, the ease of installation and the acqoustic properties or the material as well as environmental factors.

Other environmental factors need to be considered when selecting the right materials for the job; these include pipes being placed in positions such as:

exposed to excessive heat from the sun or other heat source, such as a furnace in a factory.
on a car park wall, with no protection, where pipes could be damaged by a vehicle
at a factory where a fork-lift could crash into the unprotected pipe.
having exposure to corrosive chemicals such as acids.

Temperature

The temperature of the liquid discharge can affect discharge pipes. For example discharges from glass or dishwashing cleaners may be as high as 90 degrees. The pipes carrying these high temperature discharges may require additional support along their length and allowances may also need to be made for the higher expansion rate of the pipe.

Characteristics of materials and products

Materials used for discharge pipes include:

unplasticised polyvinyl chloride (PVC-U)
high density polyethylene (HDPE) (Plastics)
polypropylene
copper and copper alloy
galvanised steel
glass
glass-filament-reinforced thermosetting plastic (GRP)
fibre-reinforced concrete (FRC).

PVC-U has a high expansion rate, which has to be considered when using it with high temperature discharges. With a wide range of fittings available and the durability of the material it is an ideal pipe for carrying many different liquids.

HDPE can be used for trade waste installations with temperatures up to 1000C for short periods and 800C for constant flow. Always check manufactures specifications to ensure pipe materials are compatible for the installation.

Copper pipe can be used in many applications, where high durability is required. It is fire resistant and impact resistant. Copper pipe can be used to manufacture fittings for use with copper pipes, although a large range of fittings may also be purchased. Copper pipe is available in different wall thicknesses, known as ‘types’, with Type A being the thickest through to Type D. AS/NZS3500.2 Section 2 sets out the limitations on the use of the pipes and fittings. Copper pipe is unsuitable for the discharge of urinals, but if the discharge is diluted then it may be used.

Copper alloy pipe is similar to copper pipe in that it has the advantage of being used for making fittings, or may be purchased ready-made. Again as with copper, consult the AS/NZS3500.2 Section 2 for information on the limitations of use.

Galvanised steel pipe is tough and durable. It will resist impact and uses threads to join the pipes and fittings together. Consult AS/NZS3500.2 Section 2 for information on the limitations of use.

For information and limitations on the use of glass, glass-filament-reinforced thermosetting plastic (GRP), polypropylene, fibre-reinforced concrete (FRC), consult AS/NZS3500.2 Section 2, and manufacturers’ instructions.

Worksheet
Now go to the Worksheet and answer Questions 1 – 4.

Regulations

When working on any task you must work to the plans and specifications of the job and the WHS requirements, in accordance with the State or Territory legislation. Materials must comply with AS/NZS3500.2

Note
Read AS/NZS3500 2 and note clauses and information for the following headings under the Regulations.

The Regulations include:

Limitations on the use of pipes and fittings for non-pressure applications
Graded discharge pipes
Minimum grades of discharge pipes
Trapping of fixtures and appliances
Support and fixing of pipe work.
Length of discharge pipes to:-
Stacks
Direct to drain
Floor waste gullies
Disconnector gullies
Group ventilated branch pipes
Size of discharge pipes
Inspection openings in discharge pipes
Bends in discharge pipes
Venting of fixture discharge pipes

When installing a discharge pipe, all WHS requirements must be met. This may include areas such as: