2146 version 3
28-Jun-16
1 of 3
PLUMBING
Design water supply systems
level:
5
credit:
9
planned review date:
April 1998
sub-field:
Plumbing, Gasfitting and Drainlaying
purpose:
This unit standard is for people who work, or intend to work
in plumbing. People credited with this unit standard will be
able to determine water supply conditions and system
requirements and design potable, irrigation, flushing and fire
protection water supply systems.
entry information:
Open.
accreditation option:
Evaluation of documentation and visit by NZQA and
industry.
moderation option:
A centrally established and directed national moderation
system has been set up by The Skills Organisation.
special notes:
New Zealand Building Code and Approved Documents, G10
Piped Services, G12 Water Supplies, Manufacturers'
specifications, Water supply protection regulations, NZS
3501: 1976, NZS 4219: 1983, NZS 4302: 1987, NZS 5807
Part 2: 1980, BS 1723 Part 1: 1986, BS 1845: 1984, AS
1167 Part 1: 1984, AS 3500 Part 1: 1992, Health and Safety
in Employment Act 1992.
 New Zealand Qualifications Authority 2016
2146 version 3
28-Jun-16
2 of 3
PLUMBING
Design water supply systems
Elements and Performance Criteria
element 1
Determine owner and user requirements.
Range:
domestic, recreational, commercial, industrial.
performance criteria
1.1
Owner and user requirements are identified and listed.
1.2
Water supply system devices and components selected in accordance with
Acts, Codes and manufacturers' instructions, refer special note.
element 2
Design water system.
Range:
potable, grey, flushing, irrigation, fire protection.
performance criteria
2.1
The water supply systems are explained.
2.2
Water supply system design and detail specifications conform to provisions of
Acts, Standards, Codes and manufacturers' instructions, refer special note.
element 3
Maintain safe working environment.
performance criteria
3.1
Work practices are carried out without injury to worker, public, or damage to
building, other services, tools or equipment, refer special note.
 New Zealand Qualifications Authority 2016
2146 version 3
28-Jun-16
3 of 3
PLUMBING
Design water supply systems
Comments to:
The Skills Organisation
Freepost 5164
PO Box 24-469
Royal Oak
Auckland 1345
Please Note:
Providers must be accredited by the Qualifications Authority
before they can offer programmes of education and training
assessed against unit standards.
Accredited providers assessing against unit standards must
engage with the moderation system that applies to those unit
standards. [Please refer to relevant Plan ref: 0008]
 New Zealand Qualifications Authority 2016