1、NSF International Standard / American National StandardNSF/ANSI 42 - 2016Drinking Water Treatment Units - Aesthetic Effects NSF International, an independent, not-for-profit, non-governmental organization, is dedicated to being the leading global provider of public health and safety-based risk manag
2、ement solutions while serving the interests of all stakeholders. This Standard is subject to revision. Contact NSF to confirm this revision is current. Users of this Standard may request clarifications and interpretations, or propose revisions by contacting: Chair, Joint Committee on Drinking Water
3、Treatment Units c/o NSF International 789 North Dixboro Road, P. O. Box 130140 Ann Arbor, Michigan 48113-0140 USA Phone: (734) 769-8010 Telex: 753215 NSF INTL FAX: (734) 769-0109 E-mail: infonsf.org Web: http:/www.nsf.orgi NSF International Standard/ American National Standard for Drinking Water Tre
4、atment Units Drinking water treatment units Aesthetic effects Standard Developer NSF International NSF International Designated as an ANSI Standard August 14, 2016 American National Standards Institute ii Prepared by The NSF Joint Committee on Drinking Water Treatment Units Recommended for adoption
5、by The NSF Council of Public Health Consultants Adopted by The NSF Board of Directors March 1973 Revised June 1982 Addendum 1.0 June 2002 Revised February 2011 Revised June 1988 Addendum 2.0 October 2002 Revised February 2012 Revised September 1996 Editorial revision, November 2003 Revised December
6、2012 Revised September 1997 Addendum 1.0 August 2004 Revised December 2013 Revised November 1998 Revised April 2005 Revised January 2015 Revised September 1999 Editorial revision, June 2005 Revised October 2015 Revised July 2000 Revised July 2007 Revised February 2017 Revised November 2000 Revised O
7、ctober 2007 Revised January 2001 Addendum March 2008 Revised January 2002 Revised August 2009 Published by NSF International PO Box 130140, Ann Arbor, Michigan 48113-0140, USA For ordering copies or for making inquiries with regard to this Standard, please reference the designation “NSF/ANSI 42 2016
8、.” Copyright 2017 NSF International Previous editions 2015, 2014, 2013, 2012, 2011, 2009, 2008, 2007, 2005, 2004, 2002, 2001, 2000, 1999, 1998, 1997, 1996, 1988, 1982, 1973 Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic o
9、r mechanical, including photocopying and microfilm, without permission in writing from NSF International. Printed in the United States of America. iii Disclaimers1 NSF, in performing its functions in accordance with its objectives, does not assume or undertake to discharge any responsibility of the
10、manufacturer or any other party. The opinions and findings of NSF represent its professional judgment. NSF shall not be responsible to anyone for the use of or reliance upon this Standard by anyone. NSF shall not incur any obligation or liability for damages, including consequential damages, arising
11、 out of or in connection with the use, interpretation of, or reliance upon this Standard. NSF Standards provide basic criteria to promote sanitation and protection of the public health. Provisions for mechanical and electrical safety have not been included in this Standard because governmental agenc
12、ies or other national standards-setting organizations provide safety requirements. Participation in NSF Standards development activities by regulatory agency representatives (federal, local, state) shall not constitute their agencys endorsement of NSF or any of its Standards. Preference is given to
13、the use of performance criteria measurable by examination or testing in NSF Standards development when such performance criteria may reasonably be used in lieu of design, materials, or construction criteria. The illustrations, if provided, are intended to assist in understanding their adjacent stand
14、ard requirements. However, the illustrations may not include all requirements for a specific product or unit, nor do they show the only method of fabricating such arrangements. Such partial drawings shall not be used to justify improper or incomplete design and construction. Unless otherwise referen
15、ced, the Annexes are not considered an integral part of NSF Standards. The Annexes are provided as general guidelines to the manufacturer, regulatory agency, user, or certifying organization. 1 The information contained in this Disclaimer is not part of this American National Standard (ANS) and has
16、not been processed in accordance with ANSIs requirements for an ANS. Therefore, this Disclaimer may contain material that has not been subjected to public review or a consensus process. In addition, it does not contain requirements necessary for conformance to the Standard. This page is intentionall
17、y left blank.v Contents 1 General . 1 1.1 Purpose 1 1.2 Scope . 1 1.3 Alternate materials, designs, and construction 1 1.4 Chemical and mechanical reduction performance claims . 1 1.5 Minimum requirements. 1 1.6 Treatment train . 2 2 Normative references . 2 3 Definitions . 3 4 Materials . 3 4.1 Mat
18、erials in contact with drinking water . 3 4.2 Materials evaluation . 4 4.3 Gas chromatography/mass spectroscopy (GC/MS) analysis 5 4.4 Materials in contact with the users mouth . 7 5 Structural performance . 14 5.1 Structural integrity 14 5.2 Acceptance 14 5.3 Working pressure . 15 5.4 Structural in
19、tegrity test methods 15 6 Minimum performance requirements 21 6.1 Elements 21 6.2 Waste connections . 21 6.3 Product water dispensing outlets . 21 6.4 Hazards 21 6.5 Operation temperature . 21 6.6 Rated service flow 21 6.7 POE rated pressure drop . 22 6.8 Minimum service flow . 22 6.9 Active agents
20、and additives . 22 7 Elective performance claims test methods 23 7.1 General requirements 23 7.2 Bacteriological performance 25 7.3 Chemical reduction testing . 27 7.4 Mechanical reduction testing . 50 7.5 Scale control testing . 53 8 Instruction and information . 54 8.1 Installation, operation, and
21、 maintenance instruction 54 8.2 Data plate . 56 8.3 Replacement components . 57 8.4 Performance data sheet . 58 Annex A . A1 Annex B . B1 Annex C .C1 Annex D .D1 Annex E . E1 Annex F . F1 Annex G G1 This page is intentionally left blank.vii Foreword2 The purpose of this Standard is to establish mini
22、mum requirements for materials, design, construction, and performance of drinking water treatment units that are designed to reduce specific aesthetic-related contaminants in public or private water supplies. This Standard specifies the minimum product literature and labeling information that a manu
23、facturer must supply to authorized representatives and system owners. Lastly, the Standard provides minimum service-related obligations that the manufacturer must extend to system owners. This edition of the Standard contains the following revisions: Issue 75 This revision added language to state th
24、at systems be conditioned using the test water with the specified contaminant for chemical reduction claims under section 7. Issue 88 Sampling point instructions for squeeze bottles in Annex E were clarified. Issue 92 CAS numbers were added to Table 4.1 (previously Table 1) of the materials evaluati
25、on criteria. The tables in this edition have also been changed to reflect the appropriate section in which it is located: Previous edition of NSF/ANSI 42 Current edition of NSF/ANSI 42 Table 1 Table 4.1 Table 2 Table 4.2 Table 3 Table 4.3 Table 4 Table 4.4 Table 5 Table 5.1 Table 6 Table 6.1 Table 7
26、 Table 7.1 Table 8 Table 7.2 Table 9 Table 7.3 Table 10 Table 7.4 Table 11 Table 7.5 Table 12 Table 7.6 Table 13 Table 7.7 Table 14 Table 7.8 Table 15 Table 7.9 Table 16 Table 7.10 Table 17 Table 8.1 Table 18 Table 8.2 2 The information contained in this Foreword is not part of this American Nationa
27、l Standard (ANS) and has not been processed in accordance with ANSIs requirements for an ANS. Therefore, this Foreword may contain material that has not been subjected to public review or a consensus process. In addition, it does not contain requirements necessary for conformance to the Standard. Th
28、is Standard was developed by the NSF Joint Committee on Drinking Water Treatment Units using the consensus process described by the American National Standards Institute. Suggestions for improvement of this Standard are welcome. This Standard is maintained on a Continuous Maintenance schedule and ca
29、n be opened for comment at any time. Comments should be sent to Chair, Joint Committee on Drinking Water Treatment Units at standardsnsf.org, or c/o NSF International, Standards Department, P.O. Box 130140, Ann Arbor, Michigan 48113-0140, USA. 1 2017 NSF NSF/ANSI 42 2016 NSF/ANSI Standard for Drinki
30、ng Water Treatment Units Drinking water treatment units Aesthetic effects 1 General 1.1 Purpose It is the purpose of this Standard to establish minimum requirements for materials, design and construction, and performance of drinking water treatment systems that are designed to reduce specific aesthe
31、tic-related (non-health effects) contaminants in public or private water supplies. This Standard also specifies the minimum product literature and labeling information that a manufacturer shall supply to authorized representatives and system owners as well as the minimum service-related obligations
32、that the manufacturer shall extend to system owners. 1.2 Scope The point-of-use and point-of-entry systems addressed by this Standard are designed to be used for the reduction of specific substances that may be present in drinking water (public or private) considered to be microbiologically safe and
33、 of known quality. Systems covered under this Standard are intended to reduce substances affecting the aesthetic quality of the water or to add chemicals for scale control, or both. Substances may be soluble or particulate in nature at concentrations influencing public acceptance of the drinking wat
34、er. It is recognized that a system may be effective in controlling one or more of these substances but is not required to control all. Systems with components or functions covered under other NSF or NSF/ANSI standards or criteria shall conform to the applicable requirements therein. 1.3 Alternate ma
35、terials, designs, and construction While specific materials, designs, and construction may be stipulated in this Standard, systems that incorporate alternate materials, designs, and construction may be acceptable when it is verified that such systems meet the applicable requirements stated herein. 1
36、.4 Chemical and mechanical reduction performance claims 1.4.1 All NSF/ANSI 42 performance claims shall be verified and substantiated by test data generated under the requirements of NSF/ANSI 42. 1.4.2 When performance claims are made for substances not specifically addressed in the scope of this Sta
37、ndard or for substances not specifically addressed but falling under the scope of NSF/ANSI 42, such claims shall be identified as not specifically addressed in the Standard. 1.5 Minimum requirements This Standard establishes minimum requirements. A system as defined in this Standard shall meet the a
38、pplicable requirements of 4, 5, 6, and 8, and at least one performance claim as described in 7. 2017 NSF NSF/ANSI 42 2016 2 A component as defined in this Standard shall meet the requirements of 4 and 8. If the component is pressure-bearing, it shall also meet the applicable requirements of 5. A com
39、mercial modular system as defined in this Standard shall meet the applicable requirements of 4, 5, 6, and 8, and at least one performance claim as described in 7. Manifolds of commercial modular systems shall meet the requirements of 4, 5 (if pressure bearing), and 8, and shall be evaluated as stand
40、-alone components. Manifolds shall have a minimum internal diameter such that the water velocity in the manifold will not exceed 3 m (10 ft) per second (which can be calculated based upon the system flow rate and the manifold internal diameter). Individual modular elements evaluated as a manifold an
41、d modular element combination shall meet the applicable requirements of 4, 5, 6, and 8, and at least one performance claim as described in 7. 1.6 Treatment train A system that contains multiple, sequential treatment technologies for a performance claim under this Standard shall meet the applicable r
42、equirements as described in Annex G. 2 Normative references The following documents contain requirements that, by reference in this text, constitute requirements of this Standard. At the time of publication, the indicated editions were valid. All of the documents are subject to revision and parties
43、are encouraged to investigate the possibility of applying the recent editions of the documents indicated below. The most recent published edition of the document shall be used for undated references. APHA, Standard Methods for the Examination of Water and Wastewater, twentieth edition3 NSF/ANSI 51.
44、Food Equipment Materials NSF/ANSI 53. Drinking water treatment units Health effects NSF/ANSI 60. Drinking water treatment chemicals Health effects NSF/ANSI 61. Drinking water system components Health effects ISO 12103-1:1997. Road Vehicles Test dust for filter evaluation Part 1: Arizona test dust4 U
45、SEPA-600/4-79-020. Methods for the Chemical Analysis of Water and Wastes, March 19835 USEPA-600/4-84/053. Methods for Organic Chemical Analysis of Municipal and Industrial Wastewater, June 19845 USEPA-600/R-94/111. Methods for the Determination of Metals in Environmental Samples, Supplement 1, May 1
46、9945 USEPA-90/020. Methods for the Determination of Organic Compounds in Drinking Water, Supplement 1, July 19905 3 American Public Health Association (APHA), 800 I Street, NW, Washington, DC 20001 . 4 International Organization for Standardization (ISO), Case postale 56, CH-1211 Geneve 20, Switzerl
47、and . 5 USEPA, Environmental Monitoring and Support Laboratory, Cincinnati, OH 45268 . 2017 NSF NSF/ANSI 42 2016 3 USEPA Guidelines Establishing Test Procedures for the Analysis of Pollutants, 40 CFR Part 1366 USEPA National Primary Drinking Water Regulations, 40 CFR Part 1416 USEPA National Seconda
48、ry Drinking Water Regulations, 40 CFR Part 1436 USFDA Code of Federal Regulations, Title 21, (Food and Drugs) Direct Food Additive Sub-stances Parts 170 through 199, April 1, 19927 3 Definitions Terms used in this Standard that have a specific technical meaning are defined in NSF/ANSI 330. 4 Materia
49、ls 4.1 Materials in contact with drinking water 4.1.1 POE drinking water treatment units shall conform to the protocol and criteria in NSF/ANSI 61. 4.1.2 POU drinking water treatment units shall conform to the protocol and criteria in this section. 4.1.3 Acceptance criteria 4.1.3.1 Materials in contact with drinking water shall not impart levels of target compounds or Tentatively Identified Compounds (TICs) that exceed the Total Allowable Concentration (TAC), Maximum Contaminant Levels (MCL), or Maximum Acceptable Concentration (MAC) cr
