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WorksheetsRepair and modification of service pipes
Total questions: 13
Worksheet time: 7mins
What types of fittings are permissible for use on copper pipe ?
Solder
compression
fusion
End load resistant
Manipulative mechanical
What should distinguish new service pipes from other utility pipes and cables ?
size
Length
Coloured blue
Also marked on side of pipe
Ground type
Why might you replace a section of service pipe ?
In the wrong place
To shallow
Corrosion
Leakage
To aid installation of new fitting
What checks would you make on a stop tap before installing it ?
Easily operates
Crutch fitted tightly
Right material
Correct material
Treads in tact
Give two ways of interrupting the flow of a service pipe ?
Don't connect it
Freezing it
Squeeze it off
Crimp it
Cut it
What checks need to be made on a split collar ?
Correct size
Correct material
Nuts & bolts
Rubber in good condition
Free from dents and damage
How is the risk of corrosion in new service pipes best avoided ?
By keeping an eye on the weather
By not using the pipe
By using polyethylene pipes and fittings
By using a bore hole
What pipe materials is permissible to use to replace a section of lead service pipe ?
Aluminium
Copper
Polyethylene
Alkathene
PVC
What distinguishing features does copper service pipe have
Reddish brown
Metallic
Thin walled
Coated in plastic
How can pipes be protected from corrosion ?
Lay in correct ground
Lay above ground
Replace with polyethylene
Wrap in protective tape
cover with pipe surround
What is the usual point at which the service pipe ownership changes from water undertaker ownership to customer ownership ?
Pavement
Middle of the carriageway
The boundary of the highway where it adjoins the customers property
Outside customers kitchen window
Why must repairs be checked under mains pressure before backfilling ?
To check if they are the correct size
To check if they are the right colour
To keep the cost down
To avoid further leaks and damage
How would you recognise conditions that might cause corrosion ?
Check existing services for signs of corrosion
Rust
Look for high water table
Colour of the ground
