QUESTION 4
(a) Give TWO reasons why polyethylene pipes should not be used above ground.
1
2

(2 marks)

(b)   State the purpose of a pigtail on an LPG installation, and state where it should be located.

Purpose   
Location 

(2 marks)

(c)  State THREE advantages of using polyethylene pipe instead of steel pipe for underground
gas service lines.
1
2
3

(3 marks)
Total 7 marks

Linkback: https://forum.plumbers.nz/gas-exam-june-2007/21/question-4/128/