NZS 4441:2008
Swimming pool design Standard
This is a substantial revision of the 1985 Code of practice for swimming pools. The revision covers the essentials of design and construction of public, institutional, and private freshwater and seawater swimming pools, and the provision of water treatment facilities. It provides guidance on the suitable minimum requirements to set when contracting for design and construction of swimming pools or when contemplating the purchase of a pool, and guidelines for the requirements that should be met to achieve safety and good operational management. It does not cover the provision of heating or other special equipment, operation and maintenance, nor the supervision necessary to ensure the physical safety of pool users.
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Committee Representation
Acknowledgement
Copyright
Contents
Referenced documents
Related documents
Related websites
Latest revisions
Review of Standards
Foreword
1 GENERAL
1.2 Interpretation
1.3 Definitions
1.4 Abbreviations
2 LEGISLATION AND RELEVANT STANDARDS
2.1 Design
2.2 Relevant New Zealand Standards
3 POOL TYPES AND LIMITING DIMENSIONS
3.1 Types of swimming pools
3.2 Plan dimensions
3.3 Slope of pool bottoms
3.4 Diving pools
4 STRUCTURAL DESIGN AND CONSTRUCTION
4.1 Design
4.2 Watertightness testing of pool structures
4.3 Design of in-ground pools
4.4 Hydrostatic relief valves
5 POOL SURFACES AND SURROUNDS
5.1 General
5.2 Internal pool surfaces
5.3 Pool surrounds
6 POOLCOMPONENTS AND FITTINGS
6.1 General
6.2 Avoidance of entrapment
6.3 Steps and ladders
6.4 Handrails
6.5 Other fittings
6.6 Bulkheads
6.7 Moveable floors
7 SIGNAGE AND MARKINGS
7.1 Pool safety signs
7.2 Lane marks
7.3 Depth marks
8 MISCELLANEOUS SERVICES
8.1 Lighting
8.2 Air heating and ventilation
8.3 Water heating
8.4 Noise
9 POOL WATER INLETS AND OUTLETS
9.1 Filling and make-up water connection
9.2 Pool inlets
9.3 Pool water outlets
10 OVERFLOW CHANNELS AND THE TOPS OF POOL WALLS
10.1 General
10.2 Capacity
10.3 Construction
11 SKIMMERS
11.1 General
11.2 Capacity
11.3 Construction
12 WATER CIRCULATION AND TREATMENT
12.1 Circulation and treatment system
12.2 Flow capacity
12.3 Treatment processes
12.4 Materials
12.5 Installation
13 WATER TREATMENT CIRCULATION RATE
13.1 Pool bathing load, circulation rate, and turnover period
14 WATER QUALITY, DISINFECTION, and pH CONTROL
14.1 Water quality
14.2 Disinfection and pH
14.3 Disinfection
14.4 Control of pH
14.5 Alkalinity control
14.6 Testing equipment
15 RECIRCULATION PUMPS
15.1 Flow capacity
15.2 Pump details
15.3 Pump motors
16 HAIR AND LINT STRAINER
17 GRANULAR and multi-media filters
17.1 Types
17.2 Filter medium
17.3 Filter medium bed depth
17.4 Rate of filtration
17.5 Backwashing
17.6 Filter construction
17.7 Pressure tests
17.8 Ancillary equipment
17.9 Coagulation
18 PRE-COTE FILTRATION
18.1 Types
18.2 Filter medium or filter aid
18.3 Rates of filtration
18.4 Construction and design
18.5 Pre-coating
18.6 Body feed
18.7 Ancillary equipment
19 PLANT ROOMS AND CHEMICAL STORAGE
19.1 General
19.2 Chemical storage
19.3 Chlorine rooms
19.4 Filter rooms
20 BALANCE TANKS
20.1 General
20.2 Balance tank dimensions
20.3 Inlet from pool overflow channels
20.4 Make-up water inlet
20.5 Flow-equalising connection
20.6 Overflow
20.7 Pump suction
20.8 Drain
APPENDIX
A–DESIGN CONSIDERATIONS
B –POOL DIMENSIONS AND TEMPERATURES
C –PROTECTION AGAINST ENTRAPMENT
D –PRE-COAT FILTER MEDIUM SELECTION
E – BALANCE TANK OPERATION
Table
1 – Pool water surface areas used to determine instantaneous bathing load
2 – Indicative turnover period for public pools
Figure
C1 – Probes for determination of head and neck entrapment in completely bound openings
C2 – Test template for assessment of head and neck entrapment in partially bound and v-shaped openings
C3 – Method of insertion of the ‘B’ portion of the test template
C4 – Method of insertion of the ‘A’ portion of the test template
C5 – Finger rods
C6 – Rotation of the 8 mm diameter finger rod
E1 – Operation of a balance tank
Previous versions
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References
Code of practice for solid plastering
Pool water quality
Safety barriers and fences around swimming pools, spas and hot tubs
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Committee Representation
Acknowledgement
Copyright
Contents
Referenced documents
Related documents
Related websites
Latest revisions
Review of Standards
Foreword
1 GENERAL
1.2 Interpretation
1.3 Definitions
1.4 Abbreviations
2 LEGISLATION AND RELEVANT STANDARDS
2.1 Design
2.2 Relevant New Zealand Standards
3 POOL TYPES AND LIMITING DIMENSIONS
3.1 Types of swimming pools
3.2 Plan dimensions
3.3 Slope of pool bottoms
3.4 Diving pools
4 STRUCTURAL DESIGN AND CONSTRUCTION
4.1 Design
4.2 Watertightness testing of pool structures
4.3 Design of in-ground pools
4.4 Hydrostatic relief valves
5 POOL SURFACES AND SURROUNDS
5.1 General
5.2 Internal pool surfaces
5.3 Pool surrounds
6 POOLCOMPONENTS AND FITTINGS
6.1 General
6.2 Avoidance of entrapment
6.3 Steps and ladders
6.4 Handrails
6.5 Other fittings
6.6 Bulkheads
6.7 Moveable floors
7 SIGNAGE AND MARKINGS
7.1 Pool safety signs
7.2 Lane marks
7.3 Depth marks
8 MISCELLANEOUS SERVICES
8.1 Lighting
8.2 Air heating and ventilation
8.3 Water heating
8.4 Noise
9 POOL WATER INLETS AND OUTLETS
9.1 Filling and make-up water connection
9.2 Pool inlets
9.3 Pool water outlets
10 OVERFLOW CHANNELS AND THE TOPS OF POOL WALLS
10.1 General
10.2 Capacity
10.3 Construction
11 SKIMMERS
11.1 General
11.2 Capacity
11.3 Construction
12 WATER CIRCULATION AND TREATMENT
12.1 Circulation and treatment system
12.2 Flow capacity
12.3 Treatment processes
12.4 Materials
12.5 Installation
13 WATER TREATMENT CIRCULATION RATE
13.1 Pool bathing load, circulation rate, and turnover period
14 WATER QUALITY, DISINFECTION, and pH CONTROL
14.1 Water quality
14.2 Disinfection and pH
14.3 Disinfection
14.4 Control of pH
14.5 Alkalinity control
14.6 Testing equipment
15 RECIRCULATION PUMPS
15.1 Flow capacity
15.2 Pump details
15.3 Pump motors
16 HAIR AND LINT STRAINER
17 GRANULAR and multi-media filters
17.1 Types
17.2 Filter medium
17.3 Filter medium bed depth
17.4 Rate of filtration
17.5 Backwashing
17.6 Filter construction
17.7 Pressure tests
17.8 Ancillary equipment
17.9 Coagulation
18 PRE-COTE FILTRATION
18.1 Types
18.2 Filter medium or filter aid
18.3 Rates of filtration
18.4 Construction and design
18.5 Pre-coating
18.6 Body feed
18.7 Ancillary equipment
19 PLANT ROOMS AND CHEMICAL STORAGE
19.1 General
19.2 Chemical storage
19.3 Chlorine rooms
19.4 Filter rooms
20 BALANCE TANKS
20.1 General
20.2 Balance tank dimensions
20.3 Inlet from pool overflow channels
20.4 Make-up water inlet
20.5 Flow-equalising connection
20.6 Overflow
20.7 Pump suction
20.8 Drain
APPENDIX
A–DESIGN CONSIDERATIONS
B –POOL DIMENSIONS AND TEMPERATURES
C –PROTECTION AGAINST ENTRAPMENT
D –PRE-COAT FILTER MEDIUM SELECTION
E – BALANCE TANK OPERATION
Table
1 – Pool water surface areas used to determine instantaneous bathing load
2 – Indicative turnover period for public pools
Figure
C1 – Probes for determination of head and neck entrapment in completely bound openings
C2 – Test template for assessment of head and neck entrapment in partially bound and v-shaped openings
C3 – Method of insertion of the ‘B’ portion of the test template
C4 – Method of insertion of the ‘A’ portion of the test template
C5 – Finger rods
C6 – Rotation of the 8 mm diameter finger rod
E1 – Operation of a balance tank
Previous versions
NZS 4441:2008
Online Library subscription pricing
The cost of your subscription will depend on which standards you want to access, and how many people in your organisation need to be able to access the Online Library subscription at the same time (concurrent users). During your subscription period, we are also able to make any necessary changes and ensure you are aware of any pricing changes that result. For a quote, contact our Online Library team by emailing onlinelibrary@standards.govt.nz.