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Offline LisaS

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Question 3
« on: February 11, 2009, 09:37:30 AM »
QUESTION 3
(a)  A pool heater is to be located across a lawn. The gas supply pipe is to be laid under the lawn.
List EIGHT steps which are necessary to lay a polyethylene gas supply line to the swimming pool
heater from an existing installation.
 1
 2
 3
 4
 5
 6
 7
 8
(8 marks)

(b)  Give THREE reasons why a polyethylene (PE) pipe must be replaced by a metal pipe before an
unsleeved gas supply pipe rises above ground to connect to a gas appliance.
 1
 2
 3
(3 marks)
Total 11 marks

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