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AS 2118.6-1995 AUTOMATIC FIRE SPRINKLER SYSTEMS - COMBINED SPRINKLER AND HYDRANT

AS 2118.6-1995 AUTOMATIC FIRE SPRINKLER SYSTEMS - COMBINED SPRINKLER AND HYDRANT

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This Australian Standard was prepared by Committee FP/4, Automatic Sprinkler
Installations. It was approved on behalf of the Council of Standards Australia on
14 March 1995 and published on 5 July 1995.

The following interests are represented on Committee FP/4:
Asset Services, Department of Administrative Services
Australian Building Codes Board
Australian Chamber of Commerce and Industry
Australian Chamber of Manufactures
Australian Fire Authorities Council
Australian Fire Protection Association
Australian Water and Sewerage Authorities
Commonwealth Fire Board
CSIRO — Division of Building, Construction and Engineering
Department of Defence
Fire Protection Industry Association of Australia
Institution of Engineers, Australia
Insurance Council of Australia
Master Plumbers and Mechanical Services Association of Victoria
Melbourne Water
New Zealand Fire Equipment Association
Telecom Australia
The Association of Consulting Engineers, Australia

Review of Australian Standards. To keep abreast of progress in industry, Australian Standards are subject
to periodic review and are kept up to date by the issue of amendments or new editions as necessary. It is
important therefore that Standards users ensure that they are in possession of the latest ed ition, and any
amendments thereto.
Full details of all Australian Standards and related publications will be found in the Standards Australia
Catalogue of Publications; this information is supplemented each month by the magazine ‘The Australian
Standard’, which subscribing members receive, and which gives details of new publications, new editions
and amendments, and of withdrawn Standards.
Suggestions for improvements to Australian Standards, addressed to the head office of Standards Australia,
are welcomed. Notification of any inaccuracy or ambiguity found in an Australian Standard should be made
without delay in order that the matter may be investigated and appropriate action taken.

This Standard was issued in draft form for comment as DR 93292.

AS 2118.6—1995

Australian Standard 

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Automatic fire sprinkler systems
Part 6: Combined sprinkler
and hydrant

PUBLISHED BY STANDARDS AUSTRALIA
(STANDARDS ASSOCIATION OF AUSTRALIA)
1 THE CRESCENT, HOMEBUSH, NSW 2140
ISBN 0 7262 9753 4

AS 2118.6 — 1995

2

PREFACE
This Standard was prepared by the joint Standards Australia/Standards New Zealand
Committee on Automatic Sprinkler Installations to be Part 6 of AS 2118. It is the result of
a consensus among representatives on the joint committee to produce it as an Australian
Standard.
The revision to AS 2118 includes Standards Australia’s requirements to keep product and
installation Standards separate. When complete the series will comprise:

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AS
2118

4118

Automatic fire sprinkler systems
Part 1:
Standard
Part 2:
Wall wetting sprinklers (Drenchers)
Part 3:
Deluge
Part 4:
Residential
Part 5:
Domestic
Part 6:
Combined sprinkler and hydrant
Part 9:
Piping support and installation
Part 10: Approval documentation
Fire
Part
Part
Part
Part
Part
Part
Part
Part
Part

sprinkler systems
1.1: Components — Sprinklers and sprayers
1.2: Components — Alarm valves (wet)
1.3: Components — Water monitors
1.4: Components — Valve monitors
1.5: Components — Deluge and pre-action valves
1.6: Components — Stop valves and non-return valves
1.7: Components — Alarm valves (dry)
1.8: Components — Pressure reducing valves
1.9: Accelerators and exhausters

Part 2.1: Piping — General
The terms ‘normative’ and ‘informative’ have been used in this Standard to define the
application of the appendix to which they apply. A ‘normative’ appendix is an integral part
of a Standard, whereas an ‘informative’ appendix is only for information and guidance.

 Copyright

STANDARDS AUSTRALIA

Users of Standards are reminded that copyright subsists in all Standards Australia publications and software. Except where the
Copyright Act allows and except where provided for below no publications or software produced by Standards Australia may be
reproduced, stored in a retrieval system in any form or transmitted by any means without prior permission in writing from
Standards Australia. Permission may be conditional on an appropriate royalty payment. Requests for permission and information on
commercial software royalties should be directed to the head office of Standards Australia.
Standards Australia will permit up to 10 percent of the technical content pages of a Standard to be copied for use exclusively
in-house by purchasers of the Standard without payment of a royalty or advice to Standards Australia.
Standards Australia will also permit the inclusion of its copyright material in computer software programs for no royalty
payment provided such programs are used exclusively in-house by the creators of the programs.
Care should be taken to ensure that material used is from the current edition of the Standard and that it is updated whenever the
Standard is amended or revised. The number and date of the Standard should therefore be clearly identified.
The use of material in print form or in computer software programs to be used commercially, with or without payment, or in
commercial contracts is subject to the payment of a royalty. This policy may be varied by Standards Australia at any time.

3

AS 2118.6 — 1995

CONTENTS
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SECTION 1 SCOPE AND GENERAL
1.1 SCOPE . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 NEW DESIGNS AND INNOVATIONS . . .
1.3 REFERENCED DOCUMENTS . . . . . . . . .
1.4 DEFINITIONS . . . . . . . . . . . . . . . . . . . . .

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SECTION 2 SYSTEM REQUIREMENTS
2.1 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 LOCATION AND ACCESS TO SPRINKLER CONTROL ASSEMBLIES . .
2.3 LOCATION AND ACCESS TO FIRE MAIN ISOLATION VALVES . . . . .
2.4 ACCESS TO FIRE HYDRANTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.5 PROTECTION OF SUPPLY PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.6 FIRE MAIN (RING) RETICULATION . . . . . . . . . . . . . . . . . . . . . . . . . .
2.7 PRESSURE REDUCING VALVES . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.8 WATER SUPPLIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.9 FIRE SERVICE BOOSTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.10 FIRE ALARM INITIATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.11 FIRE ALARM CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.12 MONITORING OF ISOLATING VALVES . . . . . . . . . . . . . . . . . . . . . . . .

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SECTION 3 PIPES, VALVES AND FITTINGS
3.1 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 VALVES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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SECTION 4 TESTING
4.1 GENERAL . . . . . . . . . . . . . . . . .
4.2 PRE-TEST PREPARATION . . . . .
4.3 HYDROSTATIC TEST . . . . . . . . .
4.4 FLOW TESTS . . . . . . . . . . . . . . .
4.5 RECORDING OF TEST RESULTS

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APPENDICES
A REFERENCED DOCUMENTS . . . . . . . . . . . . . . . . . . . . . . . . .
B LOCATION OF FIRE HYDRANTS AND SPRINKLER CONTROL
C SYSTEM PHILOSOPHY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D SYSTEM RESISTANCE CURVE FOR COMBINED SPRINKLER
AND HYDRANT SYSTEMS . . . . . . . . . . . . . . . . . . . . . . . . . . .
E WIRING SYSTEMS RATING . . . . . . . . . . . . . . . . . . . . . . . . . .
F TYPICAL SPRINKLER CONTROL ASSEMBLIES AND
PRESSURE CONTROL STATIONS . . . . . . . . . . . . . . . . . . . . . .

First published as AS 2118.6 — 1995.

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VALVES . . 10
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AS 2118.6—1995

4

STANDARDS AUSTRALIA
Australian Standard
Automatic fire sprinkler systems
Part 6: Combined sprinkler and hydrant
S E C T I O N

1

S C O P E

A N D

G E N E R A L

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1.1 SCOPE This Standard sets out the minimum requirements for the installation,
commissioning and testing of a combined sprinkler and hydrant system, for installation in
multistorey buildings as an alternative option to using separate sprinkler and hydrant systems,
or separate sprinkler and hydrant installations utilizing a combined fire main (see AS 2118.1).
1.2 NEW DESIGNS AND INNOVATIONS Any alternative materials, designs, methods
of assembly, procedures and similar that do not comply with the specific requirements of this
Standard, or are not mentioned in it, but give the equivalent results to those specified are not
necessarily prohibited.
1.3 REFERENCED DOCUMENTS
Appendix A.

A list of referenced documents is given in

1.4 DEFINITIONS For the purpose of this Standard the definitions given in AS 2118.1,
AS 2419.1, AS 2484.1, AS 2484.2, AS 3500.0 and that below apply.
1.4.1 Combined system — an integrated system of sprinkler and fire hydrant reticulation
where the sprinkler system is fed from a fire main designed to supply the concurrent water
requirements of both the sprinkler and hydrant system.

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5

S E C T I O N

2

S Y S T E M

AS 2118.6—1995

R E Q U I R E M E N T S

2.1 GENERAL Except as modified by this Standard, combined systems shall comply with
the requirements of AS 2118.1, AS 2419.1 and AS 2941.
2.2 LOCATION AND ACCESS TO SPRINKLER CONTROL ASSEMBLIES Sprinkler
control assemblies shall be located within —
(a)

a common fire-rated exit; or

(b)

a fire-rated room directly accessible from the common fire-rated exit.

Sprinkler isolation valves shall be located on each storey.
A ‘Sprinkler Stop Valve Inside’ wall plate shall be affixed externally to the egress door of
the common fire-rated exit where it discharges to a public place or open area
(see Appendix B, for examples of required valve locations).

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2.3 LOCATION AND ACCESS TO FIRE MAIN ISOLATION VALVES Access to any
fire main isolation valve shall be from within a fire-rated exit (stairway) or a fire-rated room
directly accessible from the fire-rated exit.
2.4 ACCESS TO FIRE HYDRANTS
enclosure.

Fire hydrants shall not be located within a locked

Hydrants, where located in an enclosure, shall remain accessible at all times.
2.5 PROTECTION OF SUPPLY PIPING Piping between the source of water supply and
the ring main/s shall be subject to the fire resistance and mechanical protection requirements
of AS 2118.1 and AS 2419.1.
2.6

FIRE MAIN (RING) RETICULATION

2.6.1 Pipe sizing Piping to which sprinkler installations and fire hydrants are directly
connected shall be reticulated through the building in the form of ring mains (one ring for
each pressure zone). Piping shall be sized by hydraulic calculation (see AS 2118.1) subject
to the following minimum pipe diameters —
(a)

in buildings not exceeding 25 m effective height . . . . . . . . . . . . . . . . . . DN 100

(b)

in buildings exceeding 25 m effective height . . . . . . . . . . . . . . . . . . . . . DN 150.

The vertical portions of the ring main pipes shall be located within separate fire-rated exits
(stairways) or fire-rated riser shafts. In the case of adjoining pressure zones, which do not
share a common horizontal cross connection, each cross connection shall be located within
its own pressure zone.
2.6.2

Pressure zones

Separate pressure zones shall be provided where —

(a)

the pressure at any sprinkler head exceeds the limitations imposed by AS 2118.1;

(b)

the pressure at any fire hydrant exceeds the limitations imposed by AS 2419.1; or

(c)

the effective height of the building exceeds 50 m.

The number of pressure zones shall not be less than one for each 50 m rise in building
height.

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AS 2118.6—1995

2.6.3 Isolation valves
that —

6

Each pressure zone shall incorporate isolation valves arranged so

(a)

not less than 75% of fire hydrants in that zone; and

(b)

not less than 50% of fire hydrants at each floor level;

can remain operable upon isolation in any fire main (ring) section between valves.
NOTE: See Appendix C, Figures C3 to C5 for typical schematic system configurations.

Isolation valves shall be located such that not more than four storeys of sprinklers would be
isolated.
2.7 PRESSURE REDUCING VALVES Where pressure reducing valves are incorporated
they shall be provided with an isolating valve on each side of the pressure reducing valve.
2.8

WATER SUPPLIES

2.8.1 Combined system water flow rate The combined system water flow rate shall be
the aggregate of the fire hydrant requirement, in accordance with AS 2419, and the sprinkler
requirement, in accordance with AS 2118.1, taken at the hydraulically most favourable
location determined in accordance with Appendix D.
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2.8.2
(a)

Source of water supply The system water supply shall be sourced from —
two separate on-site storage tanks, each tank being not less than 50% of the combined
capacity which is sufficient to provide water to the combined fire hydrant and sprinkler
system for the duration required by AS 2419.1 and AS 2118.1.
NOTE: The tanks may be located at high or low level and pumps shall be fitted as required.

(b)

two town mains which form part of an interconnected town mains system, each of the
town mains being capable of providing water to the installation at the necessary
pressure and flow to permit proper operation, either with or without pumps, having stop
valves so arranged that in the event of a breakdown, anywhere in the system, at least
one of the mains to the installation can remain operative.

(c)

one town main and one on-site storage tank each of which shall be capable, with pumps
installed if necessary, of providing water at the necessary pressure and flow for proper
operation of the combined installation.

2.8.3 Fire mains (feed) A separate fire main (feed) shall be connected to each zone, or
where a cascade system using pressure reducing arrangements is used, duplicate fire mains
(feed) shall be connected to the highest zone.
2.9 FIRE SERVICE BOOSTER Each zone shall be equipped with a booster facility for
the connection of a fire authority pump appliance. The booster facility shall comply with the
requirements of AS 2419.1.
2.10 FIRE ALARM INITIATION The sprinkler fire alarm shall be initiated in
accordance with the requirements of AS 2118.1.
2.11 FIRE ALARM CIRCUITS Each fire alarm initiating device shall be wired to a Fire
Indicator Panel (FIP) constructed in accordance with AS 1603.4.
The sprinkler alarm on each floor shall provide a separate indication at the FIP, clearly
identified as a sprinkler alarm for that particular floor.
Sprinkler fire alarm transmission from the FIP to the local fire authority shall be via a
dedicated landline. Where the FIP contains other detection systems they shall be connected
to the local fire authority in accordance with the requirements of AS 1670.
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7

AS 2118.6—1995

Wiring between each switch and the FIP shall be in fire-rated wiring, having a system
performance of at least WS52W, in accordance with AS 3013 (see Appendix E).
2.12 MONITORING OF ISOLATING VALVES Each sprinkler isolation valve, fire
main isolation valve or any valve capable of isolating the water supply to the system,
excluding valves under the control of the water authority, shall be monitored separately at
the FIP. Monitors shall comply with the requirements of AS 2118.1 and AS 2419.1.

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Wiring between each switch and the FIP shall be in fire-rated wiring, having a system
performance of at least WS52W, in accordance with AS 3013.

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AS 2118.6—1995

S E C T I O N

8

3

P I P E S ,

V A L V E S

A N D

F I T T I N G S

3.1 GENERAL Pipes, valves and fittings shall comply with the requirements of
AS 2118.1, AS 2419, and AS 4118 (all parts).
3.2 VALVES Valves and ancillaries in the system shall comply with the requirements of
AS 4118 as follows:
(a)

Stop valves and non-return valves shall comply with the requirements of AS 4118.1.6.

(b)

Wet alarm valves shall comply with the requirements of AS 4118.1.2.

(c)

Pressure reducing valves shall comply with the requirements of AS 4118.1.8.

(d)

Valve monitors shall comply with the requirements of AS 4118.1.4.

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S E C T I O N

4

T E S T I N G

4.1 GENERAL The tests detailed in this Section shall be conducted at commissioning
time and at other times thereafter as required by the regulatory authority.
4.2 PRE-TEST PREPARATION Upon completion the combined system shall be flushed
to remove any debris which may have accumulated within the pipework during construction
of the installation.
All required cabinets, doors, hold open devices, signs, plans, padlocks, straps and any
required on-site documentation shall be complete.
4.3 HYDROSTATIC TEST The system shall be tested to not less than 1700 kPa or
1.5 times the maximum working pressure, whichever is the greater. The test shall be applied
for a duration of not less than 2 h.
NOTE: The sprinkler portions of the system may be tested to 1500 kPa.

4.4 FLOW TESTS A flow test shall be carried out within the fire main (ring) in each
pressure zone to prove that the water supply is capable of meeting the combined flow and
pressure requirements of the zone.
The pump shall be tested to prove that it is capable of delivering 50% of flow required at
65% of the pressure required by the combined system.
At each test facility location provision shall be made for a drain to accommodate the
discharge from the test.
4.5 RECORDING OF TEST RESULTS Test results shall be recorded in accordance
with the requirements of AS 2118.1 and AS 2419.1.

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9

APPENDIX

AS 2118.6—1995

A

REFERENCED DOCUMENTS
(Normative)

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AS
1603
1603.4

Automatic fire detection and alarm systems
Part 4: Control and indicating equipment

1670

Automatic fire detection and alarm systems — System design, installation and
commissioning

2118
2118.1

Automatic Fire Sprinkler Systems
Part 1: Standard

2419
2419.1

Fire hydrant installations
Part 1: System design, installation and commissioning

2484
2484.1
2484.2

Fire—Glossary of terms
Part 1: Fire tests
Fire protection and firefighting equipment

2941

Fixed fire protection installations—Pumpset systems

3013

Electrical installations—Wiring systems for specific applications

3500
3500.0

National Plumbing and Drainage Code
Part 0: Glossary of terms

4118
4118
4118
4118
4118

Fire
Part
Part
Part
Part

1.2
1.4
1.6
1.8

Sprinkler Systems
1.2: Components—Alarm valves (wet)
1.4: Components—Valve monitors
1.6: Components—Stop valves and non-return valves
1.8: Components—Pressure reducing valves

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AS 2118.6—1995

10

APPENDIX

B

LOCATION OF FIRE HYDRANTS AND
SPRINKLER CONTROL VALVES

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(Normative)

FIGURE B1

LEGEND OF SYMBOLS

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