Level 1 Diploma in Plumbing Studies PDF

Level 1 Diploma in Plumbing Studies PowerPoint Unit 110: Plastic pressure pipework presentation Join and fix © 2013 City and Guilds of London Institute. All rights reserved. 1 of 21  Level 1 Diploma in Plumbing Studies Jo...

Level 1 Diploma in Plumbing Studies PowerPoint Unit 110: Plastic pressure pipework presentation Join and fix © 2013 City and Guilds of London Institute. All rights reserved. 1 of 21  Level 1 Diploma in Plumbing Studies Join and fix Plastic pressure pipe comes in the two most common sizes for domestic installations: 15mm 22mm © 2013 City and Guilds of London Institute. All rights reserved. 2 of 21  Level 1 Diploma in Plumbing Studies Join and fix The most common way of joining plastic pressure pipe is to use the pipe manufacturer’s own push-fit fittings. © 2013 City and Guilds of London Institute. All rights reserved. 3 of 21  Level 1 Diploma in Plumbing Studies Join and fix Push-fit fittings When using plastic pressure pipe with push-fit fittings it is essential that inserts are used to reinforce the pipe. The inserts are pushed into the end of the pipe to strengthen it before the fitting is positioned. © 2013 City and Guilds of London Institute. All rights reserved. 4 of 21  Level 1 Diploma in Plumbing Studies Join and fix Push-fit fittings They have a stainless steel grab ring to hold the fitting in position on the pipe and a rubber O-ring to make a water-tight seal on the pipe. © 2013 City and Guilds of London Institute. All rights reserved. 5 of 21  Level 1 Diploma in Plumbing Studies Join and fix Push-fit fittings Most manufacturers put a mark fitting to gauge the fitting depth. It is important to mark the depth of the pipe before fitting to ensure the water-tight seal will hold fully. © 2013 City and Guilds of London Institute. All rights reserved. 6 of 21  Level 1 Diploma in Plumbing Studies Join and fix Fitting a push-fit component 1. Push the insert fully into the pipe. © 2013 City and Guilds of London Institute. All rights reserved. 7 of 21  Level 1 Diploma in Plumbing Studies Join and fix Fitting a push-fit component 2. Mark the fitting depth to ensure the pipe is fully home in the fitting. © 2013 City and Guilds of London Institute. All rights reserved. 8 of 21  Level 1 Diploma in Plumbing Studies Join and fix Styles of push-fit fittings Tee: Coupling: Elbow: Reducer: Stop-end: © 2013 City and Guilds of London Institute. All rights reserved. 9 of 21  Level 1 Diploma in Plumbing Studies Join and fix Styles of push-fit fittings These fittings are classified as reusable they can easily be removed with the use of a release key. The style of release key varies according to the manufacturer. © 2013 City and Guilds of London Institute. All rights reserved. 10 of 21  Level 1 Diploma in Plumbing Studies Join and fix Compression fittings For plastic pressure pipework a ‘type A’ compression fitting is required. This fitting compresses the olive onto the pipework and does not require the pipe to be manipulated in any way. © 2013 City and Guilds of London Institute. All rights reserved. 11 of 21  Level 1 Diploma in Plumbing Studies Join and fix Compression fittings These rely on a copper or brass ‘olive’ which is compressed (tightened) in position to keep the water-tight seal. Sometimes a small amount of seal paste can be used around the olive. © 2013 City and Guilds of London Institute. All rights reserved. 12 of 21  Level 1 Diploma in Plumbing Studies Join and fix Compression fittings Tee: Coupling: Elbow: Reducer: Stop-end: © 2013 City and Guilds of London Institute. All rights reserved. 13 of 21  Level 1 Diploma in Plumbing Studies Join and fix Compression fittings A compression fitting has three main parts: the body the olive the back nut © 2013 City and Guilds of London Institute. All rights reserved. 14 of 21  Level 1 Diploma in Plumbing Studies Join and fix Compression fittings The nut is tightened and the olive is slowly compressed onto the plastic pipe without deforming the shape of the pipe. © 2013 City and Guilds of London Institute. All rights reserved. 15 of 21  Level 1 Diploma in Plumbing Studies Join and fix Clips For plastic pressure pipe the clipping distance is much less than for copper pipe due the flexibility of plastic pipe. Polybutylene pipe can easily sag if it is not clipped correctly. © 2013 City and Guilds of London Institute. All rights reserved. 16 of 21  Level 1 Diploma in Plumbing Studies Join and fix Clipping distances Pipe diameter Horizontal Vertical spacing (m) spacing (m) 15mm 0.3 0.5 22mm 0.5 0.8 28mm 0.8 1.0 © 2013 City and Guilds of London Institute. All rights reserved. 17 of 21  Level 1 Diploma in Plumbing Studies Join and fix Clipping distances There are many different types of clips available for plastic pressure pipe, each designed for use in a specific situation. However, they all perform the same function: To prevent sagging, movement and damage to the pipe and fittings © 2013 City and Guilds of London Institute. All rights reserved. 18 of 21  Level 1 Diploma in Plumbing Studies Join and fix Clips Plastic interlocking pipe clip These can be connected to each other side by side. Plastic single push-in pipe clip This is used individually and is also available as a double clip. © 2013 City and Guilds of London Institute. All rights reserved. 19 of 21  Level 1 Diploma in Plumbing Studies Join and fix Clips Double plastic push-in clip with saddle clips This is used if two pipes run in the same direction. It is available as a single clip. Plastic nail-on clip This is used individually and is also available as a double clip. © 2013 City and Guilds of London Institute. All rights reserved. 20 of 21  Level 1 Diploma in Plumbing Studies Any questions? © 2013 City and Guilds of London Institute. All rights reserved. 21 of 21