Title AS/NZS 3500.2.2:1996 National Plumbing and Drainage - Sanitary plumbing and drainage - Acceptable solutions Licensee Licensed to LUU MINH LUAN on 26 Feb 2002 Conditions of use This is a licensed electronic copy of a document where copyright is owned or managed by Standards Australia International Your licence is a single user licence and the document may not be stored, transferred or otherwise distributed on a network You may also make one paper copy of this document if required Web Check-up AS/NZS 3500.2.2:1996 Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited Australian/New Zealand Standard® National Plumbing and Drainage Part 2.2: Sanitary plumbing and drainage—Acceptable solutions AS/NZS 3500.2.2:1996 This Joint Australian/New Zealand Standard was prepared by Joint Technical Committee WS/14, National Plumbing and Drainage Code It was approved on behalf of the Council of Standards Australia on 17 April 1996 and on behalf of the Council of Standards New Zealand on May 1996 It was published on September 1996 Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited The following interests are represented on Committee WS/14: ACT Department of Urban Services Association of Hydraulic Services Consultants, Australia AUSTAP Australian Chamber of Commerce and Industry Brisbane City Council Department of Environment and Planning, Tas Department of Housing Local Government Planning, Qld Department of Lands, Planning and Environment, N.T Department of Land and Water Conservation, N.S.W Electricity Supply Association of Australia Gas Appliance Manufacturers Association of Australia Housing Industry Association, Australia Master Builders Australia Master Plumbers Australia Melbourne Water Corporation Metal Trades Industry Association of Australia National Association Sanitary Plumbing and Drainage Contractors New Zealand Manufacturers Federation New Zealand Society of Master Plumbers and Gasfitters Plastics and Chemicals Industry Association, Australia Review of Standards To keep abreast of progress in industry, Joint Australian/ New Zealand 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 edition, and any amendments thereto Full details of all Joint Standards and related publications will be found in the Standards Australia and Standards New Zealand Catalogue of Publications; this information is supplemented each month by the magazines ‘The Australian Standard’ and ‘Standards New Zealand’, which subscribing members receive, and which give details of new publications, new editions and amendments, and of withdrawn Standards Suggestions for improvements to Joint Standards, addressed to the head office of either Standards Australia or Standards New Zealand, are welcomed Notification of any inaccuracy or ambiguity found in a Joint Australian/New Zealand 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 95149 AS/NZS 3500.2.2:1996 Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited Australian/New Zealand Standard® National Plumbing and Drainage Part 2.2: Sanitary plumbing and drainage—Acceptable solutions PUBLISHED JOINTLY BY: STANDARDS AUSTRALIA The Crescent, Homebush NSW 2140 Australia STANDARDS NEW ZEALAND Level 10, Standards House, 155 The Terrace, Wellington 6001 New Zealand ISBN 7337 0568 AS/NZS 3500.2.2:1996 PREFACE This Standard was prepared by the Joint Standards Australia/Standards New Zealand Committee WS/14 on the National Plumbing and Drainage Code, to supersede AS 3500.2 — 1990 The object of this revision is to issue it as a Joint Australian/New Zealand Standard and incorporate amendments and additions arising from industry requirements This Standard has been written in a format setting out minimum deemed-to-satisfy requirements compatible with legislation of authorities who can enforce regulations and authorize products for connection to their systems Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited 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 Attention is drawn to the publication of SAA Rul PL/1, Rulings to the Joint Australia/New Zealand Plumbing and Drainage Code Where Rulings of public significance are issued, they will be available from Standards Australia through a subscription service or by individual purchase; the subscription is a single charge for the issue of Rulings for the life of this edition of AS/NZS 3500.2.2 When rulings are included in an amendment, the specific ruling will be withdrawn at the time of publication of the amendment Enquiries should be directed to Standards Australia © Copyright STANDARDS AUSTRALIA / STANDARDS NEW ZEALAND Users of Standards are reminded that copyright subsists in all Standards Australia and Standards New Zealand publications and software Except where the Copyright Act allows and except where provided for below no publications or software produced by Standards Australia or Standards New Zealand may be reproduced, stored in a retrieval system in any form or transmitted by any means without prior permission in writing from Standards Australia or Standards New Zealand Permission may be conditional on an appropriate royalty payment Australian requests for permission and information on commercial software royalties should be directed to the head office of Standards Australia New Zealand requests should be directed to Standards New Zealand Up to 10 percent of the technical content pages of a Standard may be copied for use exclusively in-house by purchasers of the Standard without payment of a royalty or advice to Standards Australia or Standards New Zealand Inclusion of copyright material in computer software programs is also permitted without 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 or Standards New Zealand at any time AS/NZS 3500.2.2:1996 CONTENTS Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited Page FOREWORD SECTION SCOPE AND GENERAL 1.1 SCOPE 1.2 REFERENCED DOCUMENTS 1.3 DEFINITIONS 1.4 MEASUREMENT OF PIPE LENGTH 1.5 PIPE GRADES 8 8 SECTION MATERIALS AND PRODUCTS 2.1 SCOPE OF SECTION 2.2 AUTHORIZATION 2.3 SELECTION AND USE 2.4 LIMITATIONS ON USE OF PIPES AND FITTINGS FOR NON-PRESSURE APPLICATIONS 2.5 PIPES AND FITTINGS FOR PRESSURE APPLICATIONS 2.6 SHEET 2.7 JOINTING COMPONENTS 2.8 CONCRETE AND MORTAR 2.9 MISCELLANEOUS 10 10 10 10 11a 11a 12 12 12 SECTION DRAINAGE DESIGN 3.1 SCOPE OF SECTION 3.2 LOCATION OF DRAINS 3.3 SIZE OF DRAINS 3.4 GRADES OF DRAINS 3.5 LAYING OF DRAINS 3.6 PROXIMITY TO OTHER SERVICES 3.7 DEPTH OF COVER 3.8 BUILDING OVER DRAINS 3.9 VENTING OF DRAINS 3.10 UNVENTED BRANCH DRAINS 3.11 UNVENTED DRAINS DISCHARGING TO GULLIES 3.12 INLET PIPE TO DISCONNECTOR GULLY 3.13 RESTRICTION ON CONNECTIONS IN PROXIMITY TO A STACK 3.14 RE-USE OF EXISTING DRAINS 3.15 DRAINS IN CARAVAN PARKS 3.16 VACUUM SYSTEMS 3.17 COMMON EFFLUENT DRAINAGE SYSTEM 14 14 14 15 17 18 18 19 20 22 23 23 23 23 24 24 28 SECTION DRAINAGE SYSTEM 4.1 SCOPE OF SECTION 4.2 POINT OF CONNECTION 4.3 DRAINS 4.4 INSPECTION SHAFTS AND BOUNDARY TRAPS 4.5 REFLUX VALVES 4.6 GULLIES 32 32 32 33 35 35 AS/NZS 3500.2.2:1996 Page Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited 4.7 4.8 4.9 4.10 4.11 INSPECTION OPENINGS (IO) INSPECTION CHAMBERS JUNCTIONS IN DRAINS JUMP-UPS DISCONNECTION AND SEALING 42 42a 46 46a 47 SECTION EXCAVATION BEDDING SUPPORT AND BACKFILLING 5.1 SCOPE OF SECTION 5.2 EXCAVATION OF TRENCHES 5.3 CONCRETE SUPPORT FOR DRAINS 5.4 BEDDING OF DRAINS 5.5 INSTALLATION OF BACKFILL MATERIALS 5.6 DRAINS IN OTHER THAN STABLE GROUND 50 50 50 50 51 51 SECTION GENERAL DESIGN REQUIREMENTS FOR SANITARY PLUMBING SYSTEMS 6.1 SCOPE OF SECTION 6.2 FIXTURE UNIT RATINGS 6.3 TRAPPING OF FIXTURES AND APPLIANCES 6.4 GRADED DISCHARGE PIPES 6.5 JUNCTIONS IN STACKS 6.6 CONNECTIONS NEAR BASE OF STACKS 6.7 VENTS 6.8 AIR ADMITTANCE VALVES 53 53 55 55 57 59 60 60 SECTION FULLY VENTED SYSTEMS AND FULLY VENTED MODIFIED SYSTEMS — DESIGN AND INSTALLATION 7.1 SCOPE OF SECTION 7.2 SYSTEM TYPES 7.3 SIZE OF DISCHARGE PIPES 7.4 SIZE OF STACKS 7.5 TRAP VENTS 7.6 BRANCH VENTS 7.7 RELIEF VENTS 7.8 STACK VENTS 7.9 CROSS-RELIEF VENTS 7.10 HEADER VENTS 7.11 GROUP AND COMMON VENTS 7.12 OFFSETS IN STACKS 64 64 64 65 67 69 71 71 71 73 75 77 SECTION SINGLE STACK SYSTEMS AND SINGLE STACK MODIFIED SYSTEMS — DESIGN AND INSTALLATION 8.1 SCOPE OF SECTION 8.2 SYSTEM DESIGN 8.3 RATING OF FIXTURES 8.4 FIXTURES PERMITTED TO BE CONNECTED 8.5 CONNECTION OF FIXTURES WITHOUT TRAP VENTS 8.6 VENTING OF STACKS 8.7 SIZING OF STACKS 82 82 82 83 88 94 94 AS/NZS 3500.2.2:1996 Page Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited 8.8 8.9 VARIATIONS TO SINGLE STACK SYSTEMS 96 OFFSETS IN SINGLE STACK SYSTEMS ONLY 104 SECTION GENERAL INSTALLATION OF PIPEWORK 9.1 SCOPE OF SECTION 9.2 SUPPORT AND FIXING OF PIPEWORK 9.3 LOCATION 9.4 CONCEALMENT OF PIPES AND FITTINGS 9.5 TESTING AND INSPECTION OPENINGS 9.6 INSTALLATION OF COPPER AND COPPER ALLOY PIPES 9.7 INSTALLATION OF UPVC PIPES 9.8 INSTALLATION OF FRC PIPES 9.9 DISUSE OF SANITARY PLUMBING 9.10 IDENTIFICATION OF PIPES 9.11 INSTALLATION OF ABOVE-GROUND (ELEVATED) PIPEWORK AND CONNECTION OF FIXTURES USING DRAINAGE PRINCIPLES 9.12 INSTALLATION OF BOUNDARY TRAPS, REFLUX VALVES AND GULLIES ABOVE GROUND WITHIN BUILDINGS 9.13 MATERIALS AND METHODS OF JOINTING OF PIPES 114 115 SECTION 10 PUMPED DISCHARGE 10.1 SCOPE OF SECTION 10.2 GENERAL 10.3 COMPRESSED AIR EJECTION 10.4 EJECTOR VENT 10.5 WET WELLS 10.6 INSTALLATION OF PUMPS 10.7 PUMPED DISCHARGES OR RISING MAINS 10.8 PUMP DISCHARGE FROM WASTE FIXTURES 10.9 SWIMMING POOL DISCHARGE 10.10 SMALL BORE MACERATOR SYSTEMS 10.11 ELECTRICAL CONNECTION 110 110 110 111 111 112 114 114 114 114 114 118 118 118 118 118 118 119 119 120 120 120 SECTION 11 FIXTURES AND APPLIANCES 11.1 SCOPE OF SECTION 11.2 INSTALLATION OF FIXTURES FOR DISABLED PERSONS 11.3 GENERAL INSTALLATION REQUIREMENTS 11.4 PLANT ROOMS 11.5 PRESSURIZED CHAMBERS 11.6 AUTOPSY TABLES 11.7 BAIN-MARIES AND BOILING WATER UNITS 11.8 BASINS 11.9 BATHS 11.10 BEDPAN WASHERS AND SANITIZERS 11.11 BIDETS 11.12 DENTAL UNITS 11.13 DRINKING FOUNTAINS 11.14 FOOD WASTE DISPOSAL UNITS (DOMESTIC TYPE) 11.15 FLOOR WASTE GULLIES 122 122 122 122 122 122 122 123 123 123 123 123 123 123 123 AS/NZS 3500.2.2:1996 Page Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited 11.16 11.17 11.18 11.19 11.20 11.21 11.22 11.23 11.24 11.25 11.26 11.27 11.28 REFRIGERATED AND DEEP-FREEZE CABINETS SANITARY NAPKIN DISPOSAL UNITS SHOWERS SINKS SLOP HOPPERS INSTRUMENT STERILIZERS AND AUTOCLAVES CONNECTION OF TUNDISHES DOMESTIC SWIMMING POOLS TROUGHS URINALS WASHING MACHINES UNTRAPPED FLOOR DRAINS WATER CLOSET PANS 123 123 123 124 124 124 124 125 125 125 125 127 127 SECTION 12 TESTING OF SANITARY PLUMBING AND SANITARY DRAINAGE INSTALLATIONS 12.1 SCOPE OF SECTION 128 12.2 SANITARY PLUMBING TESTING 128 12.3 SANITARY DRAINAGE TESTING 128 APPENDICES A LIST OF REFERENCED DOCUMENTS 130 B PIPE GRADES CONVERSION TABLE 132 C MAXIMUM LENGTH OF FIXTURE DISCHARGE PIPE WITHOUT VENTING 133 Originated as AS 3500.2 — 1990 Jointly revised and redesignated AS/NZS 3500.2.2:1996 Incorporating: Amdt 1—1999 AS/NZS 3500.2.2:1996 FOREWORD STATUTORY REQUIREMENTS Attention is drawn to the relevant statutory requirements with respect to — (a) the qualifications of persons permitted by law to plumbing or drainage work; (b) the administrative procedures to be followed by persons performing plumbing or drainage work; and (c) the authorization of certain materials, products, fixtures, fittings and other components for connection to sewerage systems RULINGS AND INTERPRETATIONS Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited Enquires concerning the interpretation of specific Clauses contained in AS/NZS 3500.2.2 should be directed initially to the regulatory authority responsible for the locality within which work is, or is to be, conducted In the event that further clarification is required, the enquiry may be directed in writing to Committee WS/14, which is responsible for the Joint Australian/New Zealand National Plumbing and Drainage Code The Projects Manager, Committee WS/14, Standards Australia will process enquires and issue replies PROVISION FOR REVISION This Standard necessarily deals with existing conditions, but is not intended to discourage invention or to exclude materials, equipment and methods which may be developed in future Revisions will be made from time to time in view of such developments and amendments to this edition will be made only when absolutely necessary AS/NZS 3500.2.2:1996 S E C T I O N 122 1 F I X T U R E S A N D A P P L I A N C E S 11.1 SCOPE OF SECTION This Section specifies the requirements for the installation of sanitary fixtures, and appliances and their connection to the sanitary plumbing or sanitary drainage system NOTE: The requirements for other fixtures and appliances are given in Table 6.1 11.2 INSTALLATION OF FIXTURES FOR DISABLED PERSONS Unless otherwise required by the regulatory authority the facilities for disabled persons shall comply with AS 1428 11.3 GENERAL INSTALLATION REQUIREMENTS 11.3.1 Installation of fixtures Fixtures shall be secured in position, independent of support from their traps, discharge pipes or water supply connections, and installed in a manner that facilitates disconnection Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited 11.3.2 Position of fixture traps Fixture traps shall be installed downstream of the fixture outlets in accordance with Clause 6.3 11.3.3 Untrapped fixtures Fixtures that are permitted to discharge through a floor waste gully in accordance with Table 4.4 may be untrapped except in the case of drinking fountains and basins 11.3.4 Connection of combination fixture pairs Where a combination of waste fixtures is connected in pairs to a single fixture trap, the arrangement shall be in accordance with Clause 6.3.4 11.3.5 Connection of soil fixtures gullies or disconnector gullies Soil fixtures shall not discharge through floor waste 11.3.6 Fixture grates Excluding water closet pans, slop hoppers, bedpan washers and bedpan sterilizers, the outlet of all fixtures shall be provided with a grate Where the fixture trap is not accessible, the grate shall be removable 11.3.7 Sanitary flushing The requirements for the sanitary flushing of fixtures shall be in accordance with AS 3500.1 11.3.8 Fixture discharge pipes Fixture discharge pipes shall be in accordance with Clause 7.3 and Table 6.1 Waste pipes to disconnector gullies shall comply with Table 4.1 11.4 PLANT ROOMS floor waste gully Discharges from plant rooms shall drain to a trap, sump or 11.5 PRESSURIZED CHAMBERS Where a floor waste gully is located in a pressurized chamber, the trap shall be in accordance with Clause 6.3.2 11.6 AUTOPSY TABLES with the following: Autopsy tables shall be connected to drains in accordance (a) Each autopsy table shall drain through a flushing floorwaste gully with a DN 65 or larger outlet (b) The water supply to the flushing floorwaste shall be from a flush valve or cistern 11.7 BAIN-MARIES AND BOILING WATER UNITS Bain-maries and boiling water units shall drain to a tundish installed in accordance with Clause 11.22 COPYRIGHT 123 AS/NZS 3500.2.2:1996 11.8 BASINS Basins shall be fitted with a DN 40 or DN 32 (NZ only) trap and a discharge pipe of minimum size DN 40, except when installed as a fixture pair 11.9 BATHS Baths shall either be fitted with a DN 40 trap and discharge pipe or be connected untrapped to a floor waste gully (see Table 4.4) When connected to a single stack or a single stack modified system, baths shall have a capacity not exceeding 500 L 11.10 BEDPAN WASHERS AND SANITIZERS Bedpan washers and sanitizers shall be fitted with traps and discharge pipes not smaller than DN 80 11.11 BIDETS only) trap 11.12 Bidets and bidettes shall discharge through a DN 40 or DN 32 (NZ DENTAL UNITS 11.12.1 Single DN 40 A single dental unit shall discharge through a trap not smaller than Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited 11.12.2 Multiple Multiple dental units draining to a common point shall discharge through a trap not smaller than DN 50 11.13 DRINKING FOUNTAINS DN 25 (NZ only) trap 11.14 Drinking fountains shall be fitted with a DN 40 or FOOD WASTE DISPOSAL UNITS (DOMESTIC TYPE) 11.14.1 General Food waste disposal units shall not discharge to a grease arrestor 11.14.2 Outlet connection The outlet of a waste disposal unit may be connected directly to the trap of an adjoining kitchen sink 11.15 FLOOR WASTE GULLIES with Clause 4.6.7 Floor waste gullies shall be installed in accordance 11.16 REFRIGERATED AND DEEP-FREEZE CABINETS Outlet pipes from refrigerated and deep-freeze cabinets and ice-making machines shall be connected to a tundish installed in accordance with Clause 11.22 11.17 SANITARY NAPKIN DISPOSAL UNITS Sanitary napkin disposal units (macerating type) shall not discharge to a floor waste or disconnector gully 11.18 SHOWERS 11.18.1 Individual showers An individual shower shall be fitted with a minimum DN 80 grate, and shall either be connected to a minimum DN 40 trap or connect untrapped as permitted in Table 4.4 11.18.2 Shower groups the following: The connection of shower groups shall be in accordance with (a) Shower groups may drain individually or as fixture pairs in accordance with Clause 6.3.4 or to a common channel (b) Common channels shall — (i) have a minimum depth of 25 mm and a minimum width of 100 mm; (ii) have a minimum grade of 1.25% to an outlet; and (iii) discharge through a removable grate, waste trap and pipe as given in Table 11.1 COPYRIGHT AS/NZS 3500.2.2:1996 124 TABLE 11.1 SIZE OF SHOWER DRAINAGE CHANNEL OUTLETS Number of showers Size of grate DN Size of waste trap and pipe DN or to 80 80 100 40 50 65 11.18.3 Kerbing of shower groups Kerbing between adjacent showers may be omitted provided that the shower floors are constructed so that water cannot flow to adjoining shower floors 11.18.4 Prefabricated shower bases Prefabricated shower bases shall be installed in accordance with the manufacturer’s instructions Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited 11.19 SINKS 11.19.1 Kitchen sinks Kitchen sinks shall be connected, using a fixture trap and waste pipe of DN 50 or DN 40 (NZ only) directly to a soil or waste stack, drain or through a disconnector gully Triple bowl sinks shall be connected — (a) as three single bowl sinks; (b) as a fixture pair and one single bowl sink; or (c) through a single fixture trap, provided that the total length of discharge pipe between the sink outlets and the fixture trap seal is not greater than 1.2 m 11.19.2 Bar sinks Bar sinks shall be connected using fixture traps and waste pipes of minimum DN 40 or may be connected untrapped to a floor waste gully (see Table 4.4) 11.19.3 Cleaners’ sinks Cleaners’ sinks shall be connected using a fixture trap and waste pipe of DN 50, or may be connected untrapped to a floor waste gully (see Table 4.4) 11.20 SLOP HOPPERS 11.20.1 Installation Slop hoppers shall — (a) have the base no more than 20 mm above the finished floor level; and (b) be fixed by bedding with cement mortar on concrete or tiled floors, or by corrosion-resistant fasteners on wooden floors 11.20.2 Connection Slop hoppers shall be connected to a DN 80 or DN 100 trap 11.21 INSTRUMENT STERILIZERS AND AUTOCLAVES Instrument sterilizers and autoclaves shall discharge over a tundish installed in accordance with Clause 11.22 11.22 CONNECTION OF TUNDISHES Except as provided in Clause 4.6.7.8, tundishes shall connect to a waste pipe of minimum DN 40, which shall be either separately trapped or shall connect to a fixture trap When the discharge is to a fixture trap — (a) it shall be connected to above the level of the water seal; and (b) the top of the tundish shall be above the flood level rim of the fixture COPYRIGHT 125 AS/NZS 3500.2.2:1996 Pipes discharging over a tundish shall have an air gap of a size at least twice the diameter of the outlet pipe 11.23 DOMESTIC SWIMMING POOLS The discharge from domestic swimming pools shall be installed in accordance with Clause 10.9 11.24 TROUGHS 11.24.1 Ablution Ablution troughs shall be connected either to a trap not smaller than DN 50 or untrapped to a floor waste gully (see Table 4.4) 11.24.2 Laundry Laundry troughs shall be connected to fixture traps and a waste pipe not smaller than DN 40 11.25 URINALS Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited 11.25.1 Floor type Floor type urinals shall — (a) be connected to a trap no smaller than DN 50, for up to three stalls or where the urinal wall is less than m in length (b) be fitted with a DN 100 grate connecting to a trap no smaller than DN 65 and for up to eight stalls or where the urinal wall is up to m in length (c) be provided with additional outlets in accordance with Items (a) and (b) where urinals serve more than eight stalls or where the urinal is more than m in length 11.25.2 Wall-hung Wall-hung urinals other than those with an integral trap shall be connected to a trap no smaller than DN40 or DN32 for New Zealand only A floor waste gully shall be provided adjacent to any urinal or group of urinals of the wall-hung type Such floor waste gully shall be charged by either a waste fixture (see Table 4.4) or in accordance with Clause 4.6.8 11.26 WASHING MACHINES 11.26.1 Domestic clothes-washing machines clothes-washing machines shall be connected — The pumped discharge from domestic (a) over the rim of a trough; (b) into a trapped waste pipe; or (c) into a floor waste gully (see Tables 4.4 and 4.5) 11.26.2 11.26.2.1 Domestic dishwashing machines (See Figure 11.1) Discharge Domestic dishwashing machines shall discharge — (a) by means of a coupled connection to a DN 40, or larger, trapped waste pipe; (b) above the water seal of a DN 50 trap fitted to the outlet of a sink; or (c) through a household food waste disposal unit 11.26.2.2 Connection of outlet hose Outlet hoses of domestic dishwashing machines shall be connected in accordance with the following: (a) Where the outlet hose is connected above the water seal of a sink trap or through a household food waste disposal unit, it shall be looped as close as possible to the underside of the sink drainer or benchtop before being extended downwards to the connection (b) If the trapped waste pipe to which connection is made, discharges — (i) to a disconnector gully, the outlet hose shall be looped at least 150 mm above the working water level of the dishwashing machine; or COPYRIGHT AS/NZS 3500.2.2:1996 (ii) 126 direct to the drain, stack or common discharge pipe, the outlet hose shall be extended at least to the top of the dishwashing machine before looping downwards to the trapped waste pipe Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited 11.26.3 Commercial dishwashing machines Commercial dishwashing machines shall be connected to a fixture trap no less than DN 50 (a) (b) (c) LEGEND: DWM = dishwashing machine FIGURE 11.1 TYPICAL CONNECTION OF DOMESTIC DISHWASHING MACHINES 11.26.4 Glass-washing machines The outlet hose and waste pipe may be connected in a similar manner to domestic dishwashing machines or connected to discharge to a floor waste gully (see Table 4.4) COPYRIGHT 127 11.27 AS/NZS 3500.2.2:1996 UNTRAPPED FLOOR DRAINS 11.27.1 General An untrapped floor drain may be installed for the purpose of draining waste water spillage from a floor in the event of overflow 11.27.2 Restrictions on use An untrapped floor drain shall not — (a) be connected to any stack or discharge pipe that connects directly to the drain; or (b) be installed in any room that contains a urinal 11.27.3 Installation Each untrapped floor drain shall — (a) be fixed and supported in accordance with Section 9; (b) have a removable grate of at least DN 40; and (c) be connected to a separate, graded discharge pipe of at least DN 40 Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited 11.27.4 Termination of discharge pipe terminate— The outlet from an untrapped floor drain shall (a) where it cannot cause damage or be a nuisance; and either (b) internally over a tundish connected to a floor waste gully, in accordance with Table 4.4; or (c) externally with a flap and within 100 mm above ground level 11.28 WATER CLOSET PANS 11.28.1 Connection Water closet pans shall be connected directly to soil stacks or drains of size no smaller than DN 80 11.28.2 Installation Water closet pans shall be securely fixed by — (a) bedding no thicker than 20 mm; (b) brackets; or (c) corrosion-resistant fasteners COPYRIGHT AS/NZS 3500.2.2:1996 128 S E C T I O N T E S T I N G O F S A N I TA RY P L U M B I N G A N D S A N I TA RY D R A I N A G E I N S TA L L AT I O N S 12.1 SCOPE OF SECTION This Section specifies requirements for the testing of sanitary plumbing and sanitary drainage installations 12.2 SANITARY PLUMBING TESTING comply with the following when tested: Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited (a) Sanitary plumbing installations shall The respective sections of any soil pipe, waste pipe, vent pipe or above-ground drain shall be free of leaks when subjected to — (i) hydrostatic test to flood level; or (ii) air test to 30 kPa for a minimum period of (b) The discharge pipe through which sewage is pumped to the sewer shall be free of leaks when subjected to a hydrostatic pressure equal to twice the shut-off head of the pump or, if a relief valve is fitted, twice the pressure at which such a valve operates (c) Sanitary fixtures of all kinds shall be tested by subjecting them to normal use After each relevant test, the residual water seal in the trap of the fixture concerned and in the trap of any other fixture connected to the same system of discharge pipes shall comply with Clause 6.3.2 (d) Where it is found upon test that, under normal operating conditions, the water seal retained in any such trap is less than 25 mm, each such trap must be ventilated in accordance with these regulations or such other provisions made that will ensure retention of a water seal of at least 25 mm NOTE: Fixtures generally used without plugs will be tested without plugs, e.g basins, bidets and similar 12.3 SANITARY DRAINAGE TESTING 12.3.1 Water test Below-ground drains shall be tested as follows: (a) A water test shall be applied to every new below-ground drain and to any section of an existing below-ground drain that has been repaired or replaced (b) The head of water on any section of drain shall not exceed m (c) The test shall be applied by — (d) (i) sealing all openings except the top of the section of the below-ground drain to be tested; (ii) filling the below-ground drain with water to the highest level in that section; and (iii) maintaining the water at this level for a period of — (A) 10 for vitrified clay drains, by the addition of measured quantities of make-up water as set out in Item (d); or (B) for drains of any other material The test is considered to be successful if the quantity of make-up water — (i) does not exceed L per 30 m length of DN 100 vitrified clay drains; (ii) does not exceed 1.5 L per 30 m length of DN 150 vitrified clay drains; or (iii) is zero during the test period for drains of other materials COPYRIGHT 129 AS/NZS 3500.2.2:1996 12.3.2 Air test As an alternative to the water test, an air test may be applied to the completed work, either in its entirety or in sections in accordance with the following: The air pressure test shall consist of applying a pressure of 30 kPa to the drain and holding this pressure for to allow the air temperature to stabilize (b) The air supply shall then be shut off and the time taken for the pressure in the pipe (to drop from 25 kPa to 20 kPa) shall be measured (c) The drain is considered to have passed the test if the time taken is greater than 90 s for pipes of size DN 225 or smaller, or 180 s for pipes of sizes DN 300 and DN 375 Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited (a) COPYRIGHT AS/NZS 3500.2.2:1996 130 APPENDIX A LIST OF REFERENCED DOCUMENTS Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited (Normative) AS 1302 Steel reinforcing bars for concrete 1304 Welded wire reinforcing fabric for concrete 1345 Identification of the contents of piping, conduits and ducts 1379 The specification and manufacture of concrete 1428 Design for access and mobility 1449 Wrought alloy steels—Stainless and heat-resisting steel plate, sheet and strip 1478 Chemical admixtures for concrete 1546 Small septic tanks 1566 Copper and copper alloys—Rolled flat products 1604 Timber — Preservative-treated — Sawn and round 1631 Cast grey and ductile iron non-pressure pipes and fittings 1646 Elastomeric seals for waterworks purposes 1650 Hot-dipped galvanized coatings on ferrous articles 1657 Fixed platforms, walkways, stairways and ladders — Design, construction and installation 2032 Code of practice for installation of UPVC pipe systems 2033 Installation of polyethylene pipe systems 2758 2758.1 Aggregates and rock for engineering purposes Part 1: Concrete aggregates 2878 Timbers — Classification into strength groups 3000 Electrical installations — Building structures and premises (known as the SAA Wiring Rules) 3500 3500.1 National Plumbing and Drainage Code Part 1: Water supply 3571 Glass filament reinforced thermosetting plastics (GRP) pipes—Polyester based — Water supply, sewerage and drainage applications 3600 Concrete structures 3706 Geotextiles — Methods of test 3972 Portland and blended cements 4139 Fibre-reinforced concrete pipes and fittings SAA MP52 Manual of authorization procedures for plumbing and drainage products COPYRIGHT 131 AS/NZS 1260 3500 3500.0 3500.2.1 Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited 3879 AS/NZS 3500.2.2:1996 PVC pipes and fittings for drain waste and vent applications National Plumbing and Drainage Code Part 0: Glossary of terms Part 2.1 Sanitary plumbing and drainage — Performance requirements Solvent cements and priming fluids for use with unplasticized PVC (UPVC) pipes and fittings NZS 3109 Specification for concrete construction 3113 Specification for chemical admixtures for concrete 3121 Specification for water and aggregates for concrete 3122 Specification for portland cement (ordinary, rapid hardening, moderate heat and sulphate resisting) 3124 Specification for concrete construction for minor works 3402 Steel bars for reinforcement of concrete 3422 Specification for welded fabric of drawn steel wire for concrete reinforcement 3631 New Zealand national timber grading rules 3640 Specification of the minimum requirements of the NZ Timber Preservation Council Inc 5807 Code of practice for industrial identification by colour, wording or other coding 7641 Specification for unplasticized PVC waste and ventilating pipe, fittings and accessories 32 mm, 40 mm, and 50 mm 7643 Code of practice for the installation of unplasticized PVC pipe systems 7649 Unplasticized PVC sewer and drain pipe and fittings NZS/AS 1650 Hot-dipped galvanized coatings on ferrous articles 1657 Fixed platforms, walkways, stairways and ladders Design, construction and installation 2033 Installation of polyethylene pipe systems NZS/BS 2494 Specification for elastomeric seals for joints in pipework and pipelines BS 2598 2598.4 Glass plant, pipeline and fittings Part 4: Specification for glass plant components 4994 Specification for design and construction of vessels and tanks in reinforced plastics ASTM A240/A240M Heat-resisting chromium and chromium-nickel stainless steel plate, sheet and strip for pressure vessels NZBC G13/AS2 Foul water, Acceptable solution COPYRIGHT AS/NZS 3500.2.2:1996 132 APPENDIX B PIPE GRADES CONVERSION TABLE (Normative) Conversion of pipe grades Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited Percentage, % Ratio (gradient) 20.00 6.65 5.00 in in 15 in 20 3.35 2.50 2.00 in 30 in 40 in 50 1.65 1.45 1.25 in 60 in 70 in 80 1.10 1.00 0.85 in 90 in 100 in 120 0.70 0.65 0.60 in 140 in 150 in 160 0.50 0.40 0.35 in 200 in 250 in 300 NOTE: The percentage figures have been rounded off to the nearest 0.05% COPYRIGHT 133 APPENDIX AS/NZS 3500.2.2:1996 C MAXIMUM LENGTH OF FIXTURE DISCHARGE PIPE WITHOUT VENTING (Normative) metres Floor waste gully Disconnector gully Fully Fully Vented vented vented drain stack (modified) Ref Cl.4.6.7.3 Fig.4.2 Table 4.4 Ref Cl.4.6 and Table 4.1 Ref Ref Ref Ref Cl.8.2 Cl.8.5 Cl.3.10 Ref.* Cl Cl.7.2.3 Fig.8.1 Fig.8.2 Fig.3.5 7.2.2 Fig.7.11 and Table Table Table 3.6 8.2 8.1 ▲ AUTOPSY TABLE (must discharge through a flushing floor waste gully) Untrapped DN 50 waste2 1.5 NP NP NP NP NP ▲ BAIN-MARIE and water boiler Untrapped DN 40 waste2 DN 40 Trap and waste 1.2 2.5 NP 6.5 NP NP NP NP Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited Fixture Single stack Single stack (modified) NP NP ▲ BASIN DN 40 trap and waste DN 32 trap and DN 40 waste (NZ only) DN 40 trap and DN 65 waste 2.5 NP NP 3.5 3.5 10.0 NP NP 10.0 2.5 2.5 NP 2.5 2.5 NP 2.5 2.5 NP ▲ BATH Untrapped DN 40 waste2 DN 40 trap and waste DN 50 trap and waste (NZ only) DN 50 trap and DN 65 waste 1.2 2.5 NP NP NP 2.5 NP 2.5 NP 2.5 NP NP 6.0 3.5 10.0 10.0 NP NP NP NP NP NP NP 10.0 10.0 2.5 6.0 NP NP NP NP 1.2 NP Australia only NP 3.5 NP NP NP 2.5 NP 2.5 NP 2.5 NP 10.0 10.0 2.5 2.5 2.5 1.2 2.5 2.5 NP NP 3.5 NP NP NP NP NP NP NP NP NP NP NP NP 2.5 2.5 3.5 3.5 NP NP 2.5 NP 2.5 NP 2.5 NP waste (NZ only) waste (NZ only) waste (NZ only) waste NP NP NP NP 3.5 3.5 3.5 3.5 NP NP NP 10.0 NP NP NP NP NP NP NP NP NP NP NP NP and DN 65 waste (NZ only) NP 3.5 10.0 2.5 NP NP and DN 65 waste NP NP 10.0 2.5 NP NP NP NP 10.0 6.0 NP NP ▲ BEDPAN washer/steriliser DN 80 trap and waste DN 100 trap and waste ▲ BIDETTE/BIDET Untrapped DN 40 waste to sealed FWG2 DN 32/40 trap and waste DN 32/40 trap and DN 65 waste ▲ DENTAL UNITS Cuspidors DN 25 or DN 40 untrapped waste sealed to FWG Evacuators (trapped tundish) DN 25, DN 32 and DN 40 trap and waste (NZ only) ▲ DRINKING FOUNTAINS and bubblers DN 40 trap and waste DN 25 and DN 32 trap and waste (NZ only) ▲ DISPOSAL UNITS (Domestic food waste) DN 40 trap DN 50 trap DN 50 trap DN 50 trap (Commercial food waste) DN 50 trap (Sanitary napkin) DN 50 trap and and and and DN DN DN DN 40 50 65 65 ▲ DISCONNECTOR GULLY TRAPS DN 100 outlet * All fixtures must be vented except for topmost fixtures (continued) COPYRIGHT AS/NZS 3500.2.2:1996 134 metres Floor waste gully Disconnector gully Fully Fully Vented vented vented drain stack (modified) Ref Cl.4.6.7.3 Fig.4.2 Table 4.4 Ref Cl.4.6 and Table 4.1 Ref Ref Ref Ref Cl.8.2 Cl.8.5 Cl.3.10 Ref.* Cl Cl.7.2.3 Fig.8.1 Fig.8.2 Fig.3.5 7.2.2 Fig.7.11 and Table Table Table 3.6 8.2 8.1 NP NP 6.0 10.0 NP 10.0 2.5 2.5 2.5 2.5 2.5 2.5 Individual DN 40 trap and DN 40 waste (NZ only) Individual untrapped DN 50 waste Individual DN 50 trap and waste Individual DN 50 trap and DN 65 waste Groups (common waste as above) Graded channel to DN 50 trap and waste Graded channel to DN 65 trap and waste 2.5 1.2 2.5 NP 3.5 NP 6.0 10.0 NP NP NP 10.0 2.5 NP 2.5 2.5 2.5 NP 2.5 2.5 2.5 NP 2.5 2.5 NP NP 6.0 10.0 NP 10.0 2.5 2.5 NP NP NP NP DN 40/50 trap and DN 50 waste DN 40/50 trap and DN 65 waste DN 40 trap and waste (NZ only) NP NP NP 6.0 10.0 3.5 NP 10.0 NP 2.5 2.5 2.5 2.5 NP NP 2.5 NP 2.5 (Bar) Untrapped DN 40 waste2 DN 40 trap and waste DN 50 trap and waste DN 50 trap and DN 65 waste 1.2 NP 2.5 2.5 NP 3.5 6.0 10.0 NP NP NP 10.0 NP 2.5 2.5 2.5 NP 2.5 NP NP NP 2.5 NP NP (Cleaner’s) Untrapped DN 50 waste2 DN 40 trap and DN 40 waste (NZ only) DN 50 trap and waste DN 50 trap and DN 65 waste 1.2 NP 2.5 — NP 3.5 6.0 10.0 NP NP NP 10.0 NP 2.5 2.5 2.5 NP 2.5 2.5 NP NP 2.5 2.5 NP ▲ POT OR UTILITY DN 50 trap and waste DN 50 trap and DN 65 waste NP NP 6.0 10.0 10.0 NP 2.5 2.5 NP NP NP NP ▲ LABORATORY DN 40 trap and waste (NZ only) DN 50 trap and waste DN 50 trap and DN 65 waste NP NP NP 3.5 6.0 10.0 NP 10.0 2.5 2.5 NP NP NP NP ▲ SLOP HOPPER DN 100 outlet NP NP 10.0 6.0 NP NP ▲ SWIMMING POOLS (pumped discharge not to exceed l/s) (Domestic) DN 40 waste (Commercial) DN 65 waste NP NP Unlimited Unlimited NP NP NP NP Untrapped DN 50 waste2 DN 50 trap and waste DN 40 trap and DN 40 waste (NZ only) DN 50 trap and DN 65 waste 1.2 2.5 NP NP NP 6.0 3.5 10.0 NP NP NP 10.0 NP 2.5 2.5 2.5 NP NP 2.5 2.5 NP NP 2.5 2.5 untrapped DN 40 waste DN 40/50 trap and DN 50 waste DN 40 trap and DN 40 waste (NZ only) DN 40/50 trap and DN 65 waste 1.2 2.5 NP NP NP 6.0 3.5 10.0 NP NP NP 10.0 NP 2.5 2.5 2.5 NP 2.5 2.5 NP NP 2.5 2.5 NP Fixture ▲ FLOOR WASTE GULLY TRAPS DN 50 outlet DN 65/80 outlet Single stack Single stack (modified) Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited ▲ SHOWERS ▲ SINKS (Kitchen) ▲ TROUGHS (Ablution) (Laundry) * All fixtures must be vented except for topmost fixtures NP NP (continued) COPYRIGHT 135 AS/NZS 3500.2.2:1996 metres Floor waste gully Disconnector gully Fully Fully Vented vented vented drain stack (modified) Ref Cl.4.6.7.3 Fig.4.2 Table 4.4 Ref Cl.4.6 and Table 4.1 Ref Ref Ref Ref Cl.8.2 Cl.8.5 Cl.3.10 Ref.* Cl Cl.7.2.3 Fig.8.1 Fig.8.2 Fig.3.5 7.2.2 Fig.7.11 and Table Table Table 3.6 8.2 8.1 DN 50 trap and waste DN 50 trap and waste and DN 65 waste NP NP NP NP NP 10.0 2.5 2.5 2.5 2.5 2.5 2.5 Up to m in length DN 50 trap with DN 50 trap and DN 65 waste NP NP 10.0 2.5 2.5 2.5 Over m in length — less than m with DN 100 grate and DN 65 trap and waste NP NP 10.0 6.0 6.0 6.0 ▲ WASHING MACHINES (Domestic clothes) hose connecting to: Untrapped DN 40 waste2 DN 40 trap and waste DN 50 trap and waste DN 50 trap and DN 65 waste 1.2 2.5 2.5 NP NP 3.5 6.0 10.0 NP NP NP 10.0 NP 2.5 2.5 2.5 NP 2.5 2.5 (Commercial clothes laundrette) Untrapped DN 50 waste2 DN 50 trap and waste DN 50 trap and DN 65 waste NP NP NP 6.0 10.0 NP NP 10.0 NP 2.5 2.5 NP NP NP NP NP 10.0 NP NP NP NP NP NP NP 6.0 3.5 10.0 NP NP 10.0 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 (Commercial dishwasher) must connect to grease arrestor DN 100 outlet) NP 10.0 NP NP NP NP Untrapped DN 50 waste2 DN 50 trap and waste DN 50 trap and DN 65 waste 1.2 2.5 NP NP 6.0 10.0 NP NP 10.0 NP 2.5 2.5 NP NP NP NP NP NP ▲ COMBINATION PAN ROOM SINK DN 100 outlet NP NP 10.0 6.0 NP NP ▲ POTATO PEELER must discharge through a peel trap and DN 50 trap and waste DN 50 trap and DN 65 waste NP NP NP NP NP 10.0 2.5 2.5 NP NP NP NP ▲ RANGES OF FIXTURES (5 Basins) DN 40 traps and DN 50 waste NP NP NP 4.5 4.5 4.5 (5W.C.’s) 100 outlets ‘P’ trap to DN 100 common discharge pipe ‘S’ trap to DN 100 common discharge pipe NP NP NP NP NP NP 10.0 10.0 10.0 10.0 10.0 10.0 (5 wall urinals) DN 50 traps to: DN 65 common discharge pipe NP NP NP 10.0 10.0 10.0 Fixture ▲ URINALS (Wall Hung) (Slab) Single stack Single stack (modified) Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited NOTE: More than stalls or m of wall, additional outlets required (Industrial laundry) To graded channel and 225 mm silt trap with DN 100 outlet (Domestic dishwasher) hose connecting to riser of kitchen sink trap — W/without domestic food waste disposal unit DN 40/50 sealed trap and DN 50 waste DN 40 trap and DN 40 waste (NZ only) DN 40/50 sealed trap and DN 65 waste (Glass) * All fixtures must be vented except for topmost fixtures (continued) COPYRIGHT AS/NZS 3500.2.2:1996 136 metres Floor waste gully Disconnector gully Fully Fully Vented vented vented drain stack (modified) Ref Cl.4.6.7.3 Fig.4.2 Table 4.4 Ref Cl.4.6 and Table 4.1 Ref Ref Ref Ref Cl.8.2 Cl.8.5 Cl.3.10 Ref.* Cl Cl.7.2.3 Fig.8.1 Fig.8.2 Fig.3.5 7.2.2 Fig.7.11 and Table Table Table 3.6 8.2 8.1 ▲ REFRIGERATED CABINETS AND STERILISERS Untrapped DN 40 waste2 DN 40 Trap and waste 1.2 2.5 NP 6.0 NP NP NP NP NP NP NP NP ▲ TUNDISHES (minor discharge) DN 25 untrapped2 DN 25 trap and waste (NZ only) DN 32 trap and waste (NZ only) DN 40 trap and waste DN 50 trap and waste 10.0 3.5 3.5 10.0 10.0 NP 3.5 3.5 3.5 6.0 NP NP NP NP NP NP NP NP 2.5 2.5 NP NP NP 2.5 2.5 NP NP NP 2.5 2.5 ▲ WATER CLOSET PAN DN 100 outlet DN 80 outlet DN 80 outlet (NZ only) NP NP NP NP NP NP 10.0 10.0 2.0 6.0 2.5 2.0 6.0 2.5 2.0 6.0 2.5 2.0 Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited Fixture * All fixtures must be vented except for topmost fixtures NOTES: Topmost fixture to a stack, refer Clause 7.5.2 Untrapped lengths not to be extended NP = not permitted ‘Minor discharge’, approximately a minimum of L per day and not more than 20 L per day COPYRIGHT Single stack Single stack (modified) ... absolutely necessary AS/ NZS 3500.2.2:1996 STANDARDS AUSTRALIA/STANDARDS NEW ZEALAND Australian/New Zealand Standard National Plumbing and Drainage Part 2.2: Sanitary plumbing and drainage — Acceptable... prohibited Australian/New Zealand Standard® National Plumbing and Drainage Part 2.2: Sanitary plumbing and drainage Acceptable solutions PUBLISHED JOINTLY BY: STANDARDS AUSTRALIA The Crescent,... and Drainage Part 2.2: Sanitary plumbing and drainage Acceptable solutions AS/ NZS 3500.2.2:1996 This Joint Australian/New Zealand Standard was prepared by Joint Technical Committee WS/14, National