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  • LEVEL 2 DIPLOMA

    STEPHEN BLAIR, PHILLIP DAVIES, TERRY GRIMWOOD, ANDY JEFFERY

    PLUMBINGSTUDIES

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  • Published by Pearson Education Limited, Edinburgh Gate, Harlow, Essex, CM20 2JE.www.pearsonschoolsandfecolleges.co.uk

    Text Pearson Education Ltd; JTL for content within ISBN 978 0 435 03131 2Edited by Maria AnsonTypeset by Tek-Art, Crawley Down, West SussexOriginal illustration Pearson Education 2013Illustrated by Tek-Art, Crawley Down, West SussexCover images: Front: Getty Images: Vetta

    The rights of Stephen Blair, Phillip Davies, JTL, Terry Grimwood and Andy Jeff ery to be identifi ed as authors of this work have been asserted by them in accordance with the Copyright, Designs and Patents Act 1988.

    First published 201316 15 14 1310 9 8 7 6 5 4 3 2 1

    British Library Cataloguing in Publication DataA catalogue record for this book is available from the British Library.

    ISBN 978 1 447 94034 0

    Copyright noticeAll rights reserved. No part of this publication may be reproduced in any form or by any means (including photocopying or storing it in any medium by electronic means and whether or not transiently or incidentally to some other use of this publication) without the written permission of the copyright owner, except in accordance with the provisions of the Copyright, Designs and Patents Act 1988 or under the terms of a licence issued by the Copyright Licensing Agency, Saff ron House, 6 10 Kirby Street, London EC1N 8TS (www.cla.co.uk). Applications for the copyright owners written permission should be addressed to the publisher.

    Printed in the UK by Butler, Tanner and Dennis

    AcknowledgementsThe author and publisher would like to thank the following individuals and organisations for permission to reproduce photographs.

    (Key: b-bottom; c-centre; l-left; r-right; t-top)

    Alamy Images: Adrian Sherratt 4, Arcaid Images 284c, Catchlight Visual Service 401, DW Images 379, fotofacade 91, Ingram Publishing 378, Jim West 39, Judith Collins 124 (Blowtorch), Justin Kase 189, Marshall Ikonography 285, Niels Poulsen std 263, Razorpix 307 (Mirror), Rosemary Owen 284r, Zoonar GmbH 92; Comstock Images: 360b; Construction Photography: Jean-Francois Cordella 372; Corbis: 35, Fancy / Veer 50; Digital Vision: 43; Fotolia.com: fasphotographic 326bl, fefufoto 322, Maksym Dykha 371, scaliger 324l, Silvano Rebai 71 (Timer); Getty Images: 389; Hepworth Building Products: 166; Imagemore Co., Ltd: 29; Imagestate Media: John Foxx Collection 373, 380; PhotoDisc: 49, 70b, 98, 139 (Screw), 360c, 377; Photolibrary.com: Moodboard 375; Photos.com: Bob Dorn 1, Jupiterimages 47; Science Photo Library Ltd: Pekka Parviainen 85; Shutterstock.com: Dmitry Bruskov 206, Dmitry Naumov 281, Zhukov Oleg 121; SuperStock: F1 Online 337; Surestop Ltd: 202b; Veer/Corbis: Barney Boogles 326br, Blue Wren 38, Ivonne 181, Keerati Thanitthitianant 357 (Hose), Keith Wilson 126 (Mini tube cutter), LCS 65t, leungchopan 93, naumoid 309, Paul Littler 145 (Pencils), rodho 290, Tom Gowanlock 289; Wavin Limited: Hepworth 141 (Plastic saddle clip), 142 (Squareline clip), 343cl, 343bl, 343br; www.imagesource.com: 2

    All other images Pearson Education Ltd: Clark Wiseman, Studio 8; Gareth Boden; Jules Selmes; Naki Photography; Stuart Cox and Trevor Cliff ord

    In some instances we have been unable to trace the owners of copyright material, and we would appreciate any information that would enable us to do so.

    WebsitesPearson Education Limited is not responsible for the content of any external internet sites. It is essential for tutors to preview each website before using it in class so as to ensure that the URL is still accurate, relevant and appropriate. We suggest that tutors bookmark useful websites and consider enabling students to access them through the school/college intranet.

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  • iii

    Contents

    Introduction iv

    Features of this book vi

    Chapter 1 Health and safety in building services engineering 1 Terry Grimwood

    Chapter 2 Electrical principles and processes for building services engineering 47 Stephen Blair

    Chapter 3 Scientific principles for domestic, industrial and commercial plumbing 85 Phillip Davies

    Chapter 4 Common plumbing processes 121 Stephen Blair

    Chapter 5 Cold water systems 181 Stephen Blair

    Chapter 6 Domestic hot water systems 241 Stephen Blair

    Chapter 7 Sanitation 281 Phillip Davies

    Chapter 8 Central heating systems 309Phillip Davies

    Chapter 9 Drainage systems 337 Phillip Davies

    Chapter 10 Understand how to communicate with others within building services engineering 371 Andy Jeffery

    Glossary 407Index 411

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  • Level 2 Diploma in Plumbing Studies

    iv

    Diploma in Plumbing Studies

    IntroductionThis book supports the Level 2 Diploma in Plumbing Studies (6035) currently off ered by City & Guilds although, at the time of writing, other awarding organisations, including EAL, off er similar qualifi cations. The diploma has been prepared by working with the awarding organisations to provide a qualifi cation for those seeking a career in the plumbing mechanical services industry.

    The diploma has been approved on the Qualifi cations and Credit Framework (QCF), the government framework that regulates all vocational qualifi cations. The QCF ensures that qualifi cations are structured and titled consistently and that they are quality assured.

    Who the qualification is aimed atThe standard industry plumbing courses, the Level 2 and 3 NVQ Diplomas, are funded only for those who are working as apprentices in the plumbing and mechanical services industries. The Diploma in Plumbing is suitable for people who are:

    not currently working in the sector but looking for a qualifi cation to support their eff orts to fi nd employment as plumbing improvers or trainees

    working in the industry but who do not have the academic qualifi cations, or breadth of experience, required to undertake the Level 2 or 3 NVQ Diplomas.

    In essence:

    the Level 2 qualifi cation is designed for people who are new to the industry. It provides the basic skills and knowledge they will need to go on to Level 3

    the Level 3 qualifi cation is aimed at those who have already completed the Level 2 qualifi cation or have some relevant experience and knowledge of the industry.

    This qualifi cation tests both practical and knowledge-based skills, but it will not qualify you as a plumber. In order to become fully qualifi ed, you will need to meet certain performance criteria which can be found in the National Occupational Standards which were created and structured by Summit Skills. Successful completion of the Level 2 NVQ Diploma will meet the requirements necessary for entry into the profession. It is possible to map the qualifi cations gained in this Level 2 Diploma across to the Level 2 NVQ Diploma, so that you only have to complete the outstanding performance units.

    Your tutor or assessor will be able to explain how you can progress onto the Level 2 and 3 NVQ Diplomas. However, you should be aware that the relevant performance units will need to be carried out in industry.

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  • v

    Introduction

    About this bookThis book supports the Level 2 Diploma in Plumbing Studies. The chapters match the qualifi cation units as follows: the unit numbering refers to the City & Guilds theory and practical units. The content is also appropriate for the Level 2 EAL qualifi cation in Plumbing and Heating 600/6725/1.

    Chapter 1 Unit 201/501 Health and safety in building services engineering

    Chapter 2 Unit 202/502 Electrical principles and processes for building services engineering

    Chapter 3 Unit 203 Scientific principles for domestic, industrial and commercial plumbing

    Chapter 4 Unit 204/504 Common plumbing processes

    Chapter 5 Unit 205/505 Cold water systems

    Chapter 6 Unit 206/506 Domestic hot water systems

    Chapter 7 Unit 207 Sanitation

    Chapter 8 Unit 208/508 Central heating systems

    Chapter 9 Unit 209/509 Drainage systems

    Chapter 10 Unit 210 Understand how to communicate with others within building services engineering

    Each unit consists of a set of outcomes. As far as possible, these outcomes have been presented in order within each chapter. There are occasions when the order has been changed to create a logical path through the chapter, but the entire content of each unit is explored within the book.

    There are progress checks and knowledge checks throughout the book, which will enable you to assess your own level of knowledge and understanding at various stages of the course.

    The book has been written by vocational lecturers with many years of experience in the plumbing and heating trade as well as in further education, where they currently teach plumbing and heating qualifi cations to wide and diverse groups of students.

    Using this bookThis book is to be used as part of your training and, beyond that, as a reference work to support your career in the plumbing and heating industry. It is not intended as a handbook to an actual installation. Nor is it a code of practice or guidance note. British Standards, manufacturers data, and HSE documents are among the materials to be used for actual installation work.

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  • Level 2 Diploma in Plumbing Studies

    vi

    Diploma in Plumbing Studies

    Features of this book

    This book has been fully illustrated with artworks and photographs. They will help to give you more information about