AS 3500 4 1 1997 national plumbing and drainage hot water

Title AS 3500.4.1-1997 National Plumbing and Drainage - Hot water supply systems Performance requirements 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 3500.4.1—1997 Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited Australian Standard National Plumbing and Drainage Part 4.1: Hot water supply systems—Performance requirements This Australian Standard was prepared by Committee WS/14, National Plumbing and Drainage Code It was approved on behalf of the Council of Standards Australia on 22 August 1997 and published on October 1997 The following interests are represented on Committee WS/14: Association of Hydraulic Services Consultants, Australia AUSTAP Australian Association of Certification Bodies Australian Building Codes Board Australian Chamber of Manufactures Australian Gas Association Brisbane Water Department of Lands Planning and Environment, N.T Department of Land and Water Conservation, N.S.W Department of Environment and Land Management, Tas Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited Department of Urban Services, A.C.T Electricity Supply Association of Australia Gas Appliance Manufacturers Association of Australia Housing Industry Association, Australia Master Builders Australia Master Plumbers Australia Metal Trades Industry Association of Australia National Association Sanitary Plumbing and Drainage Contractors, Australia New Zealand Manufacturers Federation New Zealand Society of Master Plumbers and Gasfitters Plastics and Chemicals Industry Association Australia Plumbers, Gasfitters and Drainlayers Board of New Zealand Queensland Department of Local Government and Planning South Australian Water Corporation South Australian Health Commission Sydney Water Corporation 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 editi on, and any amendments thereto Full details of all Australian Standards and related publi cations will be found in the Standards Australia Catalogue of Publi cations; 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 wit hout delay in order that the matter may be investigated and appropriate action taken This Standard was issued in draft form for comment as DR 96402 AS 3500.4.1—1997 Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited Australian Standard National Plumbing and Drainage Part 4.1: Hot water supply systems—Performance requirements First published as AS 3500.4.1—1997 PUBLISHED BY STANDARDS AUSTRALIA (STANDARDS ASSOCIATION OF AUSTRALIA) THE CRESCENT, HOMEBUSH, NSW 2140 ISBN 7337 1450 AS 3500.4.1 — 1997 PREFACE This Standard was prepared by the Joint Standards Australia/Standards New Zealand Committee WS/14, National Plumbing and Drainage Code and is the result of a consensus among representatives on the Joint Committee to produce it as an Australian Standard New Zealand performance requirements are established in New Zealand Building Regulations and are generally equivalent to those in this Standard This Standard sets out objectives in Clause Reference to AS/NZS 3500.4.2, National Plumbing and Drainage, Part 4.2: Hot water supply systems— Acceptable solutions sets out a means of achieving minimum deemed-tosatisfy requirements for the objectives and performance requirements of this Standard Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited It is recognized that the content of this Part would usually be the responsibility of a regulatory body Nevertheless, owing to the reforms taking place in the industry at present, no national body has yet been identified to take up such responsibilities Therefore, for the purpose of this edition the document is published as part of the AS 3500 series If in the future a national regulatory administration is identified, the Standard will be modified accordingly The performance requirements of this Standard have been published without a ‘durability’ clause This course of action was found necessary owing to a division existing within the committee members responsible for the document It is possible that in the future such durability requirements could become part of this document by means of an amendment or a full revision  Copyright STANDARDS AUSTRALIA Users of Standards are reminded that copyright subsists in all Standards Australi a publications and software Except where the Copyri ght Act allows and except where provided for below no publications or soft ware produced by Standards Austr alia may be reproduced, stored in a retri eval system in any form or transmitt ed by any means wit hout prior permission in wri ti ng from Standards Austr alia Permission may be conditi onal on an appropri ate royalty payment Requests for permission and information on commercial soft ware royalt ies should be dir ected to the head off ice of Standards Australi a Standards Austr alia wil l 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 Austr alia Standards Austr alia 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 materi al used is fr om the curr ent editi on 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 identif ied The use of materi al in pri nt form or in computer soft ware programs to be used commercially, with or wit hout payment, or in commercial contr acts is subject to the payment of a royalt y This policy may be varied by Standards Australi a at any ti me 3 AS 3500.4.1 — 1997 CONTENTS Page Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited SCOPE APPLICATION REFERENCED DOCUMENTS DEFINITIONS OBJECTIVES FUNCTIONAL REQUIREMENT — FIXTURES AND APPLIANCES PERFORMANCE REQUIREMENTS DEEMED TO SATISFY MEANS OF VERIFICATION 4 4 4 5 AS 3500.4.1 — 1997 STANDARDS AUSTRALIA Australian Standard National Plumbing and Drainage Part 4.1: Hot water supply systems— Performance requirements SCOPE This Standard sets out the requirements for the design and construction of hot water services, from the water service to the points of discharge APPLICATION This Standard applies to new installations, alterations, additions and repairs to existing installations NOTE: This Standard should also be read in conjunction with Australian by-laws and regulations of the regulatory authority Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited REFERENCED DOCUMENTS The following documents are referred to in this Standard: AS/NZS 3500 National Plumbing and Drainage 3500.0 Glossary of terms 3500.4.2 Part 4.2 Hot water supply systems DEFINITIONS For the purpose AS/NZS 3500.0 and that below apply 4.1 of this Standard, the definitions given in Adequate—means sufficient to achieve the objectives of this Standard OBJECTIVES The objectives of this Standard are as follows: (a) Safeguard people from illness due to consumption of, or contact with, contaminated water (b) Safeguard people from injury due to the failure of a pressure vessel or from contact with excessively hot water (c) Safeguard people from the loss of amenity arising from a lack of hot water for personal hygiene or from a water supply which is offensive in appearance, taste or odour (d) Ensure that suitable hot water facilities are provided for the use of people with disabilities (e) Ensure that the hot water supply installation throughout its design life will continue to satisfy the requirements of Items (a), (b), (c) and (d) FUNCTIONAL REQUIREMENT —FIXTURES AND APPLIANCES Fixtures and appliances where required shall have a safe and adequate piped hot water supply suitable for the intended purpose PERFORMANCE REQUIREMENTS 7.1 Hot water supplies Installations intended to supply hot water for human consumption, food preparation, utensil washing or personal hygiene shall be connected to a potable water supply COPYRIGHT 7.2 Non-potable hot water supplies hot water shall be clearly identified AS 3500.4.1 — 1997 Pipe outlets and fittings supplying non-potable 7.3 Hot water temperatures Where hot water is provided to fixtures and appliances used primarily for personal hygiene, it shall be delivered at a temperature not exceeding 50°C to avoid the likelihood of scalding 7.4 Hot water supply installations and constructed to— Hot water supply installations shall be designed (a) avoid the likelihood of contamination of potable water within both the system and the water main by means which are appropriate to the hazard; (b) provide water to fixtures and appliances at flow rates and temperatures which are adequate for the correct functioning of those fixtures and appliances under normal conditions and in a manner that does not create undue noise; (c) avoid the likelihood of leakage or failure; (d) allow reasonable access for maintenance of mechanical components; and (e) allow the system, appliances and backflow prevention devices to be isolated for testing and maintenance Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited 7.5 Pressure vessels Pressure vessels used for producing or storing hot water shall be provided with safety devices which — (a) relieve excessive pressure during both normal and abnormal conditions; and (b) limit temperatures to avoid the likelihood of flash steam production in the event of rupture 7.6 Hot water storage Heated water shall be stored under conditions which prevent the growth of legionella bacteria 7.7 People with disabilities Facilities provided for people with disabilities shall have hot water supply taps or other operational controls that are accessible and useable DEEMED TO SATISFY Compliance with AS/NZS 3500.4.2 shall be deemed to satisfy the requirements of this Standard MEANS OF VERIFICATION Verification acceptable to a regulatory authority can be demonstrated either — (a) by calculation and certification by persons or organizations with recognized credentials in the design or testing of hot water supply systems; or (b) by satisfying the required criteria when tested in accordance with a specified test method endorsed by a recognized auditing body COPYRIGHT ... NSW 2 14 0 ISBN 7337 14 5 0 AS 3500. 4. 1 — 19 97 PREFACE This Standard was prepared by the Joint Standards Australia/Standards New Zealand Committee WS/ 14 , National Plumbing and Drainage Code and is... 4 4 4 5 AS 3500. 4. 1 — 19 97 STANDARDS AUSTRALIA Australian Standard National Plumbing and Drainage Part 4. 1: Hot water supply systems— Performance requirements SCOPE This Standard sets... Australian Standard National Plumbing and Drainage Part 4. 1: Hot water supply systems—Performance requirements First published as AS 3500. 4. 1 19 97 PUBLISHED BY STANDARDS AUSTRALIA (STANDARDS ASSOCIATION