QUESTION 10
(a)  The New Zealand Building Code has clause numbers and titles that relate to drainlaying.
One of these is G13 Foul Water.
 List TWO other relevant clause numbers and their titles from this Code.
 
Number Title
1
2
 
(2 marks)
(b)  State who is allowed to lay drains under the Plumbers, Gasfitters and Drainlayers Act.
 
(2 marks)
(c) List the THREE main gases that are produced by the decomposition of sewage.
 1
 2
 3
(3 marks)

(d)   In considering drainage design in relation to an application to a territorial authority for a
building consent, a drainlayer must choose a method of compliance. Give a brief description
of each of the following methods of compliance.
 (i) Acceptable solution.
 (ii) Alternative solution.
 (iii)  Verification method.
(3 marks)
Total 10 marks

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