unit 04 common processes and techniques · with bs6572 - 20mm diameter pipe will normally suffice...

Unit 04 Common processes and techniques

Answers to activities

Activity 1

Plumber’s tool list

Activity 2

A = Masonry

B = Steel (and plastic)

C = Wood

D = Flat bit for wood where larger diameters are required

E = Hole saw for cutting steel, brass, bronze, cast iron, aluminium, wood and plastics.

Activity 3

We’re going to show you some other tools that plumbers’ use, have a guess what you think they

may be and have a go at filling in the boxes A, B, and C. the answers are at the end of the unit

Screwdrivers – flat head and cross head

Hammer

Chisels, wood and cold

Grips

Wrench

Spanners

Spirit level

Manual pipe threader

Pipe cutters

Hans saw

Pliers

Bending tools Blow torch

A. Stop tap key

B. Sink/WC plunger

C. Allen or hexagonal key


Activity 6

We’ve already shown you some straight couplings, here they are again, but this time can you name

the categories they fall into? Put your answers in the boxes and check them at the end of the unit.

Activity 11

A: MDPE compression coupling

B: PB-1 push-fit coupling

C: PVC-u solvent welded T junction

D: ABS solvent welded bend or elbow

E: PP push-fit bend or elbow

Activity 13

Activity 17

Before we start, what do you think are the advantages of using bends and offsets in pipework rather

than use fittings? Please out your answer in the box provided; use a bullet point list.

They produce larger radius bends than elbow fittings

Larger radius bends have less frictional resistance than fittings

Using bends costs less than using fittings

Long sections of pipework can be prefabricated before installation, saving time

End feed

Integral solder

ring

Compression

Push-fit

Press-fit

MDPE is used for underground cold water service pipework and its coloured blue. Jointing

methods for MDPE for domestic plumbing includes:

Compression fittings made from brass

Compression fittings made from plastic

Push-fit fittings made from plastic

Sizes for domestic applications are 20 or 25mm diameter.

http://www.pegleryorkshire.co.uk/EN/Brands/Endex/General/Line_Fittings/product/N1_Straight_coupling

http://www.pegleryorkshire.co.uk/EN/Brands/Yorkshire/General/Line_Fittings/product/YP1_Straight_coupling

http://www.pegleryorkshire.co.uk/EN/Brands/Kuterlite/K600/reordered_Coupling/product/K610_Straight_coupling

http://www.pegleryorkshire.co.uk/EN/Brands/Tectite/Sprint/Fittings/product/TT1_Straight_coupling


Activity 19

For the 90° bend in LCS:

1. Ensure a suitable hydraulic bending machine is available 2. Mark a line on the pipe at a distance from the fixed point where the centre line of the

finished bend is required 3. From this measurement you deduct the internal nominal bore of the pipe. This is because

there’s a gain in length of one pipe diameter when bends are made 4. Make sure the correct size former is in the machine 5. Put the pipe in the bending machine and line up the mark with the centre of the former 6. The machine can then be worked to apply pressure and bend the pipe to 90° 7. Due to the elasticity of the metal, you need to take it to about another 5° over the 90 to

allow it to ‘spring back’.

For the offset in copper:

1. Ensure bending equipment suitable for bending 22mm copper is available 2. Pull the first bend to the desired angle 3. Place the straight edge against the bending machine former keeping the straight edge

parallel to the tube 4. Set the measurement of the offset (100mm) by measuring from the outside of the tube to

the inside of the straight edge 5. Mark the edge of the tube against the former (in case of movement) 6. Pull the bend to complete the offset

Activity 20

We’ve compiled a list of bullet points and given you the first three work methods; we would like you

to have a go at completing the list.

Holes in masonry surfaces, hammer and chisels, large power drill

Making good to masonry surface

Lifting and replacing timber flooring materials

Notching timber floor joists

Drilling holes in timber floor joists

Cutting chases in wall and floor surfaces

Use of walking boards

Use of dust sheets

Removal of personal property


Activity 21

Using the specifications for notches and holes work out the following for a 200mm deep joist

1. The notch depth 2. The hole diameter

Notch depth is no deeper than 0.125 times the depth of the joist, so 0.125 x 200mm = 25mm

Hole diameter is no greater than 0.25 times the depth of the joist, so 0.25 x 200mm = 50mm

Activity 23

Activity 26

Here’s what you need to do:

1. Record the maximum spacings for horizontal and vertical pipework for copper, LCS and polybutylene for the sizes shown on the drawing in the table (you covered this in the table in AC 1)

Pipe size Copper R250 LCS Polybutylene

mm Inches Horizontal Vertical Horizontal Vertical Horizontal Vertical

15 ½” 1.2 1.8 1.8 2.4 0.3 0.5

22 ¾” 1.8 2.4 2.4 3.0 0.5 0.8

Nails

Screws

Plastic plugs

Heavy duty fixings

Cavity fixings


2. Think back to what you’ve read regarding the selection of clips and brackets and make a list of the clips or brackets you would select for this particular installation and the reason why. Please put your thoughts in the box.

1. Calculate the number of clips/brackets required for the pipework installations based on the spacing requirements and record them in the table and your choice of fixings

Material Horizontal Vertical

15mm/½” 22mm/¾” 15mm/½” 22mm/¾”

Copper 2 2 2 2

LCS 2 2 1 1

Polybutylene 7 4 8 5

Notes on the calculation

The easiest way to do this is to divide the pipe runs by the spacing requirement and if it’s not a

whole number add another clip on and space them equally when fixing.

The calculation will be determined by the choice of clip or bracket, for example id you’ve chosen

single or double clips, i.e. double clips will mean matching the number of clip for each pipe size.

For the vertical copper pipe runs I would use:

Single interlocking clip with lock for the 22 and 15mm pipe work, for neatness and with the clip lock for security and strength against potential/accidental damage given the location is a village hall

For the horizontal copper pipe runs I would use:

22 and 15mm copper saddles given the pipework is fixed to skirting boards as they look neater and less obtrusive

For the vertical LCS pipe runs I would use:

Malleable iron Munson rings for the ½” and ¾” pipes as they are being installed directly into the wall surface and provide a strong fixing against potential damage

For the horizontal LCS pipe runs I would use:

Malleable iron Munson rings for the ½” and ¾” pipes as they are being installed directly into the wall surface and provide a strong fixing against potential damage

For the vertical polybutylene pipe runs I would use:

Plastic nail on clips (the same colour as the pipework), as the pipework is in a lockable storage area away from the general public and the clips are going directly into timber surfaces

For the horizontal polybutylene pipe runs I would use:

Plastic nail on clips (the same colour as the pipework), as the pipework is in a lockable storage area away from the general public and the clips are going directly into timber surfaces


The other thing to remember is that the sizes given in the tables are maximum requirements, so you

can use additional clips if you think it works or looks better, clips mounted side by side always look

neater.

Activity 28 - suggested answer

Pipework from external stop valve

Pipework: From the main to the internal stop valve in blue MDPE polyethylene pipe in accordance

with BS6572 - 20mm diameter pipe will normally suffice for domestic dwellings e.g. 20mm Blue

MDPE polyethylene pressure pipe - manufactured by Polypipe.

External stop valve: The external stop valve should be suitable for underground use and must be

compatible with MDPE polyethylene pipe of the appropriate diameter e.g. K771 stopcock for

underground use/ 20mm polyethylene connections – manufactured by Peglar Yorkshire, see link:

http://www.pegleryorkshire.co.uk/EN/Brands/Kuterlite/Valves/reordered_Stopvalve/product/K771

_Stopvalve

Pipework from internal stop valve to cold water storage cistern

Pipework: From the internal stop valve to the cold water supply cistern we suggest in 15mm

polybutylene tube.

Internal stop valve: The internal stop valve must be compatible with 20mm polyethylene pipe and

15mm polybutylene. The drain off cock must be compatible with 15mm polybutylene pipe.

Combined internal stop valve and drain off cocks are also available.

Drinking water draw off: The drinking water draw off could be in the form of a tee from the 15mm

polybutylene rising main.

The rising main from the internal stop valve should be installed in one length as far as the cistern

where it shows the use of two 90o bends and a bent tap connector to the float operated valve in the

cistern, we would use polybutylene push-fit fittings.

Please note with all the suggested answers it’s not possible to give one right answer as in

some cases it’s a matter of the plumber’s preference, these suggested answers are for

guidance only.

http://www.pegleryorkshire.co.uk/EN/Brands/Kuterlite/Valves/reordered_Stopvalve/product/K771_Stopvalve

http://www.pegleryorkshire.co.uk/EN/Brands/Kuterlite/Valves/reordered_Stopvalve/product/K771_Stopvalve



1. Specify the grade of copper to be used

We would use copper to BS EN 1057 – R250 half hard

2. Specify the type of jointing method to be used and why

Non-manipulative (Type A) joints are suitable but we would use integral soldered capillary for

their neater appearance.

3. Material schedule

Hot water supply from 90o bend to sink

1450mm of 22mm copper tube to BS EN1057 - R250 horizontally and approximately 200mm of 15mm copper tube to BS EN1057 - R250 vertically.

1 YP25 Tee 22mm x 15mm x 22mm (reduced branch)

1 15mm x 15mm service valve (Peglar Yorkshire)

Cold water supply from vertical supply pipe to sink

1650mm of 15mm copper tube to BS EN 1057 - R250 horizontally; approximately 300mm of 15mm copper tube to BS EN 1057 R250 vertically- to the sink and approximately 300mm of 15mm copper tube to BS EN 1057 - R250 to the toilet cistern.

3 YP24 tees 15mm x 15mm x 15mm (Peglar Yorkshire)

3 Service 15mm x 15mm valves (Peglar Yorkshire)

1 YP 12 elbow 15mm x 15mm


1. Specify the grade of LCS to be used

We would use medium grade LCS pipe which is identified by blue colour coding.

2. Material schedule

Horizontal pipe runs

Approximate length of 2050mm of 15mm medium grade LCS (BS EN 10255: 2004) tube for the

bottom pipe run and approximately 1350mm of 15mm medium grade pipe for the top pipe run

Fittings

2 x 20mm x 15mm x 20mm malleable iron tees compatible with 20mm and 15mm medium grade tubes

3 x 15 mm malleable iron equal tees compatible with 15mm LCS medium grade tubes

1 x 15mm malleable iron 90 bend



When forming square bends the bend can be set to either the inside of the bend and inside of the

former, or outside of the bend and outside of the former; the procedures are almost identical, both

methods are equally correct and will produce perfect bends. Here’s what to do when setting the

bend to the outside of the former:

Mark the pipe to the required measurement using a pencil; this should be taken from the back of the bend to the fixed point

Make sure that the pipe is pushed fully into the former and is also inserted in the stop

Place the alloy guide over the pipe (don’t use the steel version, as these are used for bending low carbon steel tubes)

Adjust the pressure onto the guide enough to hold the pipe in position (if adjustable type)

The square is then placed against the mark on the pipe and adjusted until the square touches the outside of the former

Make a final adjustment to ensure the correct bending position

Pull the lever arm to bend the pipe slightly over the required 90°angle as this will counteract the ‘spring back’ in the bend



Ensure the fitting and the diameter of tube are compatible

Measure, mark and then cut the length of LCS tube to the correct length using a large frame hacksaw

De-burr the pipe and chamfer the end that is going to be threaded

Securely fix the LCS pipe in a vice and ensure the die is correctly set up

Apply cutting fluid to the chamfered end of the tube prior to cutting

Cut the threads into the tube (ensure that approximately 2 threads will extend beyond the end of the fitting)

Wipe away excess cutting fluid

Apply appropriate jointing material (paste, pipe sealant, PTFE tape etc.) and screw the fitting into place

Tighten pipe and fitting using appropriate tools (e.g. pipe grips, stilsons) to complete the joint


Answers to progress checks

Progress Check 1

1. List a typical tool for each of the following, put your answer in the box:

Here are a few ideas but check in the text as well:

Measuring and marking out Folding rule, pencil, tape measure, spirit level

Cutting and preparation Pipe cutters, hacksaw, files, wire wool, abrasive tape, hammers, cold chisels, wood chisels

Fabrication Pipe bending machines, bending springs, tribender

Jointing Wrenches, pliers, spanners, blow lamp

Fixing and making good Screwdrivers, drilling accessories, trowel

2. Briefly state the safety and maintenance requirements under the headings in the box; use bullet points to give an example under each. (Any from the list)

General

Make sure the tools are cleaned regularly

Lubricate the working part of tools Once cleaned lightly coat the tools with an oil spray to prevent rusting Don’t overdo the oiling

Always use the right tool for the job. Screwdrivers aren’t chisels!

Keep file or rasp teeth clean using a wire brush

Don’t use tools with split or damaged handles

Hacksaws

Make sure the teeth are pointing away from the forward cut

Don’t use with defective or worn teeth

When using a large hacksaw, make sure the blade is tightened correctly

Pipe cutters

Replace damaged or blunt cutter wheels and use the correct blade for the material being cut

Make sure that the wheel and the rollers are lubricated and move freely

Use the pipe cutter to de-burr the inside of pipework


Wood chisels

Never use with split or damaged handles

Keep the chisels sharp using a grinder and whetstone

Always keep the plastic guard on the chisel

Make sure handles aren’t loose Cold chisels

Keep the cutting edge sharp using a grinder

Keep the striking end of the chisel free from the ‘mushrooming effect’ again using a grinder

Don’t use a chisel which has been ground down too much

Hammers

Make sure the head is fitted correctly to the shaft

Don’t use a hammer with a defective shaft

Pipe grips and wrenches

Keep the teeth free from jointing compounds. If they’re made up, it could cause the tool to slip

Once the teeth become worn the tool should be replaced

Check for wear on the ratchet mechanism when using pump pliers. These often slip when under pressure

Be careful when loosening a joint or pipe that is difficult to move. It might give suddenly, and you could damage your hands, or even pull a muscle

Screwdrivers

Keep flat ended screwdrivers for slotted screws to a uniform thickness

Never use a screwdriver with a defective handle

3. Suggest the tools you would use for:

The cutting of sheet metal

De-burring a pipe

Removing a mild steel fitting from a pipe

Making good to brickwork

Straight tin snips

File or tool on pipe cutters

250mm adjustable pipe wrench

Pointing trowel


4. What would this tool be used for?

5. This tool is referred to as a

a. Crow bar b. Pry or nail bar c. Rasp d. Wrecking bar

6. This tool is known as:

a. Basin wrench b. Water pump pliers c. Adjustable wrench d. Swivel action adjustable wrench

7. Which of the following drills would be considered to be the safest?

a. Cordless b. 110v c. 230v d. 415v

If you put Cordless you would be right, but 110v and even 230v are safe if used correctly and with

the relevant safety precautions. 415v would not be found on domestic sites but could be found in

industrial premises.

Cutting plastic pipe


8. What type of drill is shown below?

9. What is a PAT test used for?

10. State three specific safety precautions when using a power saw

Take care to avoid nails and screws

Make sure guard is in place

Ensure cutting depth is same depth as floor

18v cordless right angled drill/driver

PAT (Portable Appliance Test) Tests are maintenance records used

to ensure that all portable electrical appliances are in good, safe

working order.


Progress Check 2

1. There are three categories of copper tube:

a. R220 = Soft b. R250 = Half hard c. R290 = Hard

These are soft, half hard and hard condition, please match the condition with the category.

2. The colour cold for medium grade LCS pipe is: a. Red b. Yellow c. Blue d. Brown

3. The most common use for MDPE pipe is for:

a. Soil and vent systems b. Overflows c. Underfloor heating d. Below ground water services

4. The installation of new lead pipework installations is permissible on houses built after 1970, true or false? Please put your answer in the box.

The installation of lead pipe was stopped in 1970, so it’s illegal to install lead pipe in the UK. You

can however connect to an existing lead pipe for an emergency repair.

5. The most common pipe diameter for domestic hot and cold water and central heating copper and plastic pipework is 15, 22 and:

a. 28mm b. 32mm c. 40mm d. 50mm

6. What is the type of fitting shown below? Please put your answer in the box.

False

Straight coupling with integral solder

ring

http://www.pegleryorkshire.co.uk/EN/Brands/Yorkshire/General/Line_Fittings/product/YP1_Straight_coupling


7. On the malleable iron fitting below, please identify which is the male and female thread; please enter you answers in the boxes.

8. Please complete the following table:

Solvent welded Push fit Compression

Polyethylene (MDPE) X

Polybutylene (PB-1) X

PVC-u X

Polypropylene (PP) X X

MuPVC X

ABS X

9. What activity is been carried out in the image below as part of the copper pipe jointing process? Please put our answer in the box.

10. What type of copper pipe jointing process is shown in the image below? Please put your answer in the box.

Male thread

Female thread

De-burring the inside and the

outside of the pipe

End feed joint

http://www.gfps.com/appgate/ecat/common_flow/100071/data/shared/pool/6904/web560x400.jpg


11. What type of copper pipe jointing process is shown in the image below? Please put your answer

in the box.

12. A recognised method of cutting threads on LCS pipe manually is:

13. What type of copper tube is suitable for machine or spring bending? a. BS EN 1057 - R250 b. BS EN 1057 - R220 c. BS EN 1057 - R290

14. Which of the following is the correct method for cutting plastic pipe for use in push fit fittings, A or B, please put you answer in the box.

15. The two ways of jointing PVC-u, MuPVC and ABS are:

a. Push-fit, used on soil and vent pipes b. Solvent welded, used on soil and vent pipes, waste pipes and overflow pipes.

16. Briefly explain the purpose of a bending spring.

Bending springs are used to support the tube walls while the bend is made. Internal and external

springs are available and can be used to protect the integrity of tubes up to 22mm.

17. For domestic plumbing, hydraulic machines are most suited to bend:

a. Copper tube (BS EN 1057 - R250) b. Copper tube (BS EN 1057 - R220) c. Low carbon steel tube d. Plastic pipe

Press-fit joint

The use of stocks and dies

A

B A


18. Hand held bending machines can be used to bend copper tubes with diameters of up to:

a. 22mm b. 32mm c. 42mm d. 52mm

19. What tool can be used to help determine suitable bend angles?

a. Internal bending spring b. External bending spring c. 600mm straight edge d. 600mm folding rule

20. What is the component shown below which is used in a hydraulic bending machine for bending LCS and what are the typical pipe diameters used in domestic plumbing systems?

21. The technique of drilling of joists and the threading of long lengths of coiled plastic pipe for plumbing and heating systems is specifically known as:

a. Threading b. Conduit c. Carcassing d. Cabling

22. What would this piece of equipment be used for? Please put your answer in the box.

Former, available in ½”, ¾” and 1”

for domestic use

Cold forming bends for

plastic pipe

https://cdn2.ridgid.com/resources/media?key=3853e3fd-11a6-40e7-9f98-620bbeca6a26&languageCode=en&countryCode=US&type=image


Progress check 3

1. When cutting holes in masonry surfaces the three principle hand tools needed are:

Cold chisels

Brick bolster

Club hammer

2. Metal pipework passing through masonry wall structure must always be sleeved, true aor

false, please put your answer in the box.

3. When lifting floorboards using power tools the preferred tool would be a:

a. Jig saw

b. Pad saw

c. Circular saw

d. Band saw

4. What needs to be removed from the lengths of a floor board before it can be removed.

Please put your answer into the box.

5. When drilling holes through joists to receive pipework, the centreline of the hole should be:

a. Minimum of 50mm from the top of the joist

b. Minimum of 40 mm from the bottom of the joist

c. Maximum of 50mm from the bottom of the joist

d. In the centre of the joist

6. When working in occupied premises, its important to ensure the plumber:

a. Identifies any pre-existing damage before the work starts

b. Advises other owner/occupiers in the street that work is starting

c. Make sure they have been issued with a key in case the owner/occupier goes out

d. Asks the owner/occupier where the tea and coffee making facilities are kept

7. When storing tools after work, where should they not be left overnight? Please put your

answer in the box.

True

Tongue and groove joint

In the back of the work vehicle


8. Complete the list of typical sources of information that may be required for carrying out

preparatory work.

Statutory regulations

Industry standards

Manufacturers’ technical instructions

Building plans

Specifications

9. What regulations relate specifically to the supply of water to premises? Please put your

answer in the box.

10. Which of the following building plans is most likely to be used by the domestic plumber to

determine installation requirements?

a. Block plan

b. Working drawings

c. Site plan

d. Work programme

Water Supply (Water Fittings) Regulations


Progress check 4

1. What type of nail is shown in the image?

a. Masonry b. Clout c. Round head d. Panel pin

2. When setting out for clip/brackets in a domestic dwelling, the tools required are a tape measure, pencil and… (please put your answer in the box)

3. The area marked at A is known as the:

a. Length b. Shank c. Gauge d. Slot

4. What type of screw is shown in the image?

a. Slotted b. Round head c. Pozidrive d. Phillips

5. Complete the table:

Screw size (Gauge) Drill size (mm) Plug colour code

6-8 5 Yellow

8-10 6 Red

10-14 7-8 Brown

14-18 10 Blue

Level

A


6. What type of fixing is shown in the image? Please put your answer in the box.

7. This type of fixing would most likely be used on a:

a. Block wall b. Brick wall c. Plasterboard cavity wall d. Concrete floor

8. What is the name of the fastening in the image?

a. Munson ring a. School board clip b. Saddle clip c. Channel bracket

Coach bolt


Answers to end of unit assignment

1. What are these tools called?

a. Radiator keys b. Air keys c. Allen keys d. Chuck keys

2. Which of the following is a typical voltage rating for a cordless circular saw? a. 2v b. 18v c. 110v d. 240v

3. When using powered drills or saws in an occupied dwelling, which of the following items of PPE should be used? a. Harness b. Hard hat c. Full face breathing equipment d. Goggles

4. BS EN 1057 identifies half hard copper pipe as: a. R220 b. R250 c. R290 d. R350

5. LCS for plumbing installations that is colour coded blue is classified as: a. Light grade b. Medium grade c. Heavy grade d. Extra heavy grade


6. Which of the following types of plastic is most likely to be used on a domestic hot water pipework installation in a dwelling? a. MuPVC b. ABS c. MDPE d. Polybutylene

7. What type of fitting is shown in the image?

a. Lead lock b. Capillary c. Press fit d. Universal Transition Coupling

8. A fitting that uses a tool which compresses the raised rib at the end of the fitting onto a purpose designed ‘O’ ring inside the rib, creating a water tight seal is known as: a. Push fit b. Compression c. Press-fit d. Capillary

9. The manifold below is known as:

a. Side entry b. Linear c. Top entry d. Universal

javascript:;


10. The malleable iron fitting shown in the image as known as a:

a. Socket b. Plug c. Reducing bush d. Nipple

11. MDPE pipe is used for: a. Underground cold water service pipework b. Internal gas pipework c. Hot water supply pipework d. Underfloor heating

12. When using capillary soldered fittings on water systems, what must be done before the system is brought into use? a. Polish all the pipework using wire wool b. Contact the Water Company c. Thoroughly flush the system d. Test the system using compressed air

13. What is used on LCS pipe to cut the actual threads in the pipe? a. Stocks b. Hack saw c. De-burring tool d. Dies

14. What specific safety precaution should be observed when making solvent welded joints inside a dwelling? a. Ensure there is sufficient ventilation b. Protect any furniture c. Wear plastic boot cover d. Use of dust sheets

15. When using a lever or scissor bender, what is the name of the component that is used to create the angle of the bend? a. Back guide b. Roller c. Former d. Lever arm

http://www.gfps.com/appgate/ecat/common_flow/100071/FIT/en/497226/497231/P121781/product.html


16. What type of bend is shown in the image?

a. Crank Passover bend b. Pass over offset c. 90o bend d. 45o offset

17. What is the most common method for bending ¾” LCS pipe?

a. Spring b. Tribender c. Free standing bender d. Hydraulic bender

18. When forming a bend in 15mm polybutylene pipe what is the recommended radius for the bend? a. 40mm b. 60mm c. 120mm d. 220mm

19. Which of the following tasks would the tool shown be used for?

a. Cutting small holes through concrete

b. Chopping out chases in plaster covered walls

c. Making good to holes in brickwork

d. Notching timber joists

20. When making good to holes in masonry what is the recommended mix for the mortar?

a. 4 parts sand to 1 cement

b. 4 parts cement to 1 part sand

c. 6 parts sand to 1 cement

d. 6 parts cement to 1 part sand


21. When removing lengths of floorboard, what must be removed between adjoining boards? a. Lap b. Notch c. Tongue and groove d. Biscuit

22. Which of the following is recommended for the safe storage of tools and equipment after transportation by vehicle? a. Make sure the van is locked after use b. Fit heavy duty locks on all the doors c. Notify the police that tools are being stored d. Remove tools from the van overnight

23. Rules that have a specific purpose to prevent misuse, waste, undue consumption or erroneous measurement of water and, most importantly, to prevent contamination of drinking water are known as: a. Health and Safety regulations b. Building Regulations c. Water Supply (Water Fittings) Regulations d. Gas Safety (Installation and Use) Regulations

24. Reference to Part G - Sanitation, hot water safety and water efficiency, would most likely be

found in the : a. Health and safety regulations b. Building Regulations c. Water Supply (Water Fittings) Regulations

d. Gas Safety (Installation and Use) Regulations

25. What is the recommended maximum pipe support spacing distance for horizontally mounted 15mm R250 copper pipe? a. 0.3m b. 0.5m c. 1.2m d. 1.8m

26. What type of nail should be used by a plumber when working with rough sawn timber?

a. Oval bright wire nails b. Floor brads c. Panel pins d. Masonry nails

27. What colour plastic wall plug would be used for a 10 to 14 gauge screw, in conjunction with a 7 to

8mm drill bit?

a. Yellow b. Red c. Brown d. Blue


28. What type of tool would be used to fix a coach bolt?

a. Ratchet screw driver b. Philips head screw driver c. Angled cordless driver d. Ring spanner

29. What type of clip is shown in the image?

a. Single interlocking clip with lock b. Nail on clip c. Single pipe clip d. Saddle clip

30. What colour coding is used to denote underground service pipework?

a. White b. Yellow c. Red d. Blue

31. Pipework that needs to be installed prior to the laying of floor coverings and the fitting of

plasterboard surface finishings is referred to as:

a. Prefabrication b. First fix c. Final fix d. Second fix

32. Preparing pipework away from site ready for subsequent fitting is referred to as:

a. Prefabrication b. First fix c. Final fix d. Second fix

33. Where pipework passes through a masonry wall it must be sleeved with a pipe at least:

a. The same size b. One size bigger c. Twice as big d. Three times as big


34. An intumescent collar can be used to:

a. Insulate pipework to prevent freezing b. Sleeve pipework through masonry walls c. Provide a fire stop to pipework d. Maintain the temperature in hot water pipes

35. Pipework can be protected from frost damage by using:

a. Intumescent pipe wrap b. Plastic sleeving c. A thermal fire sleeve d. Insulation

End of extract

If you’d like to discuss this material in more detail, please e-mail Steve on:

[email protected]

mailto:[email protected]

unit 04 common processes and techniques · with bs6572 - 20mm diameter pipe will normally suffice...

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