NSF 42-2015 Drinking Water Treatment Units - Aesthetic Effects.pdf

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1、NSF International Standard / American National StandardNSF/ANSI 42 - 2015Drinking 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.org NSF/ANSI 422015 i NSF International Standard/ American National Standard for D

4、rinking Water Treatment Units Drinking water treatment units Aesthetic effects Standard Developer NSF International NSF International Designated as an ANSI Standard May 11, 2015 American National Standards Institute 2015 NSF NSF/ANSI 42 2015 ii Prepared by The NSF Joint Committee on Drinking Water T

5、reatment Units Recommended for adoption by The NSF Council of Public Health Consultants Adopted by The NSF Board of Directors March 1973 Revised June 1982 Revised June 1988 Revised September 1996 Revised September 1997 Revised November 1998 Revised September 1999 Revised July 2000 Revised November 2

6、000 Revised January 2001 Revised January 2002 Addendum 1.0 June 2002 Addendum 2.0 October 2002 Editorial revision, November 2003 Addendum 1.0 August 2004 Revised April 2005 Editorial revision, June 2005 Revised July 2007 Revised October 2007 Addendum March 2008 Revised August 2009 Revised February 2

7、011 Revised February 2012 Revised December 2012 Revised December 2013 Revised January 2015 Revised October 2015 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

8、 “NSF/ANSI 42 2015.” Copyright 2015 NSF International Previous editions 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,

9、electronic or 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 responsibi

10、lity of the 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 dama

11、ges, arising 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 govern

12、mental agencies 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

13、is given to 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 ad

14、jacent standard 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 other

15、wise referenced, 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 (A

16、NS) and has 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. iv This page

17、is intentionally left blank.v Contents 1 General 9 1.1 Purpose 9 1.2 Scope . 9 1.3 Alternate materials, designs, and construction . 9 1.4 Chemical and mechanical reduction performance claims . 9 1.5 Minimum requirements 9 1.6 Treatment train 10 2 Normative references 10 3 Definitions . 11 4 Material

18、s . 11 4.1 Materials in contact with drinking water . 11 4.2 Materials evaluation 12 4.3 Gas chromatography/mass spectroscopy (GC/MS) analysis 14 4.4 Materials in contact with the users mouth . 15 5 Structural performance 23 5.1 Structural integrity . 23 5.2 Acceptance . 23 5.3 Working pressure 23 5

19、.4 Structural integrity test methods 23 6 Minimum performance requirements 29 6.1 Elements. 29 6.2 Waste connections 29 6.3 Product water dispensing outlets . 29 6.4 Hazards 29 6.5 Operation temperature 29 6.6 Rated service flow . 29 6.7 POE rated pressure drop 30 6.8 Minimum service flow 30 6.9 Act

20、ive agents and additives . 30 7 Elective performance claims test methods 31 7.1 General requirements . 31 7.2 Bacteriological performance 33 7.3 Chemical reduction testing 35 7.4 Mechanical reduction testing . 57 7.5 Scale control testing 60 8 Instruction and information 62 8.1 Installation, operati

21、on, and maintenance instruction . 62 8.2 Data plate . 63 8.3 Replacement components . 65 8.4 Performance data sheet 65 Annex A . A1 Annex B . B1 Annex C . C1 Annex D . D1 Annex E . E1 Annex F . F1 Annex G G1 vi This page is intentionally left blank.vii Foreword2 The purpose of this Standard is to es

22、tablish minimum 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

23、 that a manufacturer 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 73 This revision updated the us

24、age pattern specified for nonplumbed pour-through-type batch treatment systems when no manufacturers recommended use pattern is given. Issue 82 This revision harmonized the structural integrity requirements in Table 5 of NSF/ANSI 42, NSF/ANSI 44 and NSF/ANSI 53. Issue 83 This revision added clarific

25、ation regarding the maximum number of samples exposed in the Materials evaluation under section 4. Issue 84 This revision added criteria for utilizing a treatment train approach for the evaluation of a system containing multiple, sequential treatment technologies. Issue 85 This revision prohibits th

26、e use of chloramine-T as a source compound for chloramine reduction. This 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.

27、This Standard is maintained on a Continuous Maintenance schedule and can 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 48

28、113-0140, USA. 2 The information contained in this Foreword is not part of this American National 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 proc

29、ess. In addition, it does not contain requirements necessary for conformance to the Standard. viii This page is intentionally left blank. 2015 NSF NSF/ANSI 42 2015 9 2015 NSF NSF/ANSI 42 2015 NSF/ANSI Standard for Drinking Water Treatment Units Drinking water treatment units Aesthetic effects 1 Gene

30、ral 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 aesthetic-related (non-health effects) contaminants in public or private water supplie

31、s. 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 that the manufacturer shall extend to system owners. 1.2 Scope The point-of-use

32、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 of known quality. Systems covered under this Standard are intended to reduce su

33、bstances 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 water. It is recognized that a system may be effective in controlling one or more o

34、f 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 materials, designs, and construction While specific materials, designs, and constr

35、uction 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. 1.4 Chemical and mechanical reduction performance claims 1.4.1 All NSF/ANSI 42 pe

36、rformance 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 Standard or for substances not specifically addressed but falling under the scope o

37、f NSF/ANSI 42, such claims shall be identified as not specifically addressed in the Standard. 1.5 Minimum requirements This Standard establishes minimum requirements. 2015 NSF NSF/ANSI 42 2015 10 A system as defined in this Standard shall meet the applicable requirements of 4, 5, 6, and 8, and at le

38、ast one performance claim as described in 7. 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 commercial modular system as defined in this Standard shall meet the applicable re

39、quirements 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-alone components. Manifolds shall have a minimum internal diameter such that t

40、he 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 and modular element combination shall meet the applicable requirements of 4, 5, 6

41、, 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 requirements as described in Annex G. 2 Normative references The following docum

42、ents 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 are encouraged to investigate the possibility of applying the recent editions o

43、f 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. Food Equipment Materials NSF/ANSI 53. Drinking water treatment units Health eff

44、ects 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 USEPA-600/4-79-020. Methods for the Chemical Analysis of Water and Wastes, March

45、 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 19945 3 American Public Health Association (APHA), 800 I Street, NW, Washington,

46、 DC 20001 . 4 International Organization for Standardization (ISO), Case postale 56, CH-1211 Geneve 20, Switzerland . 5 USEPA, Environmental Monitoring and Support Laboratory, Cincinnati, OH 45268 . 2015 NSF NSF/ANSI 42 2015 11 USEPA-90/020. Methods for the Determination of Organic Compounds in Drin

47、king Water, Supplement 1, July 19905 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 Secondary Drinking Water Regulations, 40 CFR Part 1436 USFDA Code of Federal Regulati

48、ons, 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 Materials 4.1 Materials in contact with drinking water 4.1.1 POE drinking water treat

49、ment 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) criteria specified in tables 1, 2 and 3 or specified in NSF/ANSI 61 Annex D