Plumbers NZ is New Zealand's largest online plumbing, gas and drainage resource. Plumbing exam help, plumbing news, directory and free quotes.
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