1、NSF International Standard / American National StandardNSF/ANSI 40 - 2018 Residential WastewaterTreatment SystemsNSF International, an independent, not-for-profit, non-governmental organization, is dedicated to being the leading global provider of public health and safety-based risk management solut
2、ions 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 Wastewater Technology c/o
3、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: i NSF/ANSI 40 2018 NSF International Standard/ American National Standard for Wastewater Technology Residential waste
4、water treatment systems Standard Developer NSF International Designated as an ANSI Standard January 24, 2018 American National Standards Institute ii Prepared by The NSF Joint Committee on Wastewater Technology Recommended for Adoption by The NSF Council of Public Health Consultants Adopted by NSF I
5、nternational November 1970 Revised November 1978 Revised July 2000 Revised November 2010 Revised May 1983 Revised November 2004 Revised August 2012 Revised 1990 Revised August 2005 Revised April 2013 Revised May 1996 Revised January 2009 Revised April 2018 Revised January 1999 Published by NSF Inter
6、national 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 40 2018.” Copyright 2018 NSF International Previous Editions 2013, 2012, 2011, 2009, 2005, 2004, 2000, 1999, 1996, 1990, 19
7、83, 1978, 1970 Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from NSF International. Printed in the United States of America. iii Disclai
8、mers1NSF, in performing its functions in accordance with its objectives, does not assume or undertake to discharge any responsibility 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
9、 reliance upon this Standard by anyone. NSF shall not incur any obligation or liability for damages, including consequential damages, 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 protec
10、tion of the public health. Provisions for mechanical and electrical safety have not been included in this Standard because governmental agencies or other national standards-setting organizations provide safety requirement. Participation in NSF Standards development activities by regulatory agency re
11、presentatives (federal, local, state) shall not constitute their agencys endorsement of NSF or any of its Standards. Preference 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
12、of design, materials, or construction criteria. The illustrations, if provided, are intended to assist in understanding their adjacent 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 su
13、ch arrangements. Such partial drawings shall not be used to justify improper or incomplete design and construction. Unless otherwise referenced, the annexes are not considered an integral part of NSF Standards. The annexes are provided as general guidelines to the manufacturer, regulatory agency, us
14、er, or certifying organization. 1The information contained in this Disclaimer is not part of this American National Standard (ANS) and has not been processed in accordance with ANSIs requirements for an ANS. As such, this Disclaimer may contain material that has not been subjected to public review o
15、r a consensus process. In addition, it does not contain requirements necessary for conformance to the Standard. This page is intentionally left blank.v Contents 1 General . 1 1.1 Purpose . 1 1.2 Scope 1 1.3 Alternate materials, design, and construction . 1 1.4 Performance classification 1 2 Normativ
16、e references . 1 3 Definitions . 2 4 Materials . 3 4.1 Interior surfaces 3 4.2 Exterior surfaces . 3 4.3 Welding . 3 4.4 Dissimilar metals . 4 5 Design and construction . 4 5.1 Exposed surfaces . 4 5.2 Structural integrity . 4 5.3 Infiltration and exfiltration resistance . 4 5.4 Noise . 4 5.5 Mechan
17、ical components . 4 5.6 Electrical components . 4 5.7 Access ports . 5 5.8 Failure sensing and signaling equipment 5 5.9 Flow design . 6 5.10 Dataplate and service label . 6 5.11 Alternate air delivery components . 6 6 Product literature 7 6.1 Owners manual 7 6.2 Additional product literature 7 7 Ot
18、her documentation 9 8 Performance testing and evaluation . 9 8.1 Preparations for testing and evaluation 9 8.2 Testing and evaluation conditions, hydraulic loading, and schedules . 10 8.3 Sample collection 11 8.4 Analytical descriptions . 12 8.5 Criteria. 13 9 Final report 15 Annex A Limited warrant
19、y and service obligations 17 Annex B Key elements of a certification program for residential wastewater treatment systems . 21 Interpretation Annex 25 This page is intentionally left blank.vii Foreword2The purpose of this Standard is to establish minimum materials, design and construction, and perfo
20、rmance testing and evaluation requirements for residential wastewater treatment systems. This Standard specifies minimum literature requirements to be supplied by manufacturers to authorized representatives and owners. Minimum service related obligations for manufacturers to extend to owners are als
21、o specified. This edition of the Standard contains the following revisions: Issue 29 Language was added to Sections 5 and 8 regarding blowers. Issue 31 Language addressing noise requirements for indoor systems was added. This Standard was developed by the NSF Joint Committee on Wastewater Technology
22、 using the consensus process described by the American National Standards Institute. ANSI prohibits the inclusion of commercial terms and conditions, such as manufacturers warranties and guarantees, in product standards. However, the NSF Joint Committee on Wastewater Technology has historically beli
23、eved strongly that all certifiers of NSF/ANSI 40 systems should have certification program policies that contain several key elements, including requirements for warranties. It is the Joint Committees belief that these key elements provide valuable assurance of long-term performance as well as prote
24、ction of public health and the environment. To emphasize the Joint Committees convictions on this issue, two Annexes, which are not part of this Standard, are included for informational purposes and guidance. These Annexes are intended to establish a uniform program by which products meeting the sco
25、pe of this Standard should be certified. Annex A is a sample warranty, and Annex B provides the key elements of a certification program. At NSF, both Annexes have been adopted as certification program policies. Suggestions for improvement of this Standard are welcome. This Standard is maintained on
26、a Continuous Maintenance schedule and can be opened for comment at any time. Comments should be sent to Chair, Joint Committee on Wastewater Technology at standardsnsf.org, or c/o NSF International, Standards Department, PO Box 130140, Ann Arbor, Michigan 48113-0140, USA. 2The information contained
27、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. As such, this Foreword may contain material that has not been subjected to public review or a consensus process. In addition, it does not contain require
28、ments necessary for conformance to the Standard. This page is intentionally left blank.1 2018 NSF NSF/ANSI 4 - 2018 NSF/ANSI Standard for Wastewater Treatment Systems Residential wastewater treatment systems 1 General 1.1 Purpose The purpose of this Standard is to establish minimum materials, design
29、 and construction, and performance requirements for residential wastewater treatment systems. This standard also specifies the minimum literature that manufacturers shall supply to authorized representatives and owners as well as the minimum service-related obligations that manufacturers shall exten
30、d to owners. 1.2 Scope This Standard contains minimum requirements for residential wastewater treatment systems having rated treatment capacities between 1514 L/day (400 gal/day) and 5678 L/day (1500 gal/day). Management methods for the treated effluent discharged from residential wastewater treatme
31、nt systems are not addressed by this Standard. System components covered under other NSF or NSF/ANSI standards or criteria shall also comply with the requirements therein. This Standard shall in no way restrict new system designs, provided such designs meet the minimum specifications described herei
32、n. 1.3 Alternate materials, design, and construction While specific materials, designs, and constructions may be stipulated in this Standard, systems that incorporate alternate materials, designs, or constructions may be acceptable when it is verified that such systems meet the applicable requiremen
33、ts. 1.4 Performance classification For the purpose of this Standard, systems are classified according to the chemical, biological, and physical characteristics of their effluents as determined by the performance testing and evaluations described herein. All systems within a manufacturers model serie
34、s may be classified according to the performance testing and evaluation of the system with the smallest hydraulic capacity within the series. Performance testing and evaluation of larger systems within the series (having hydraulic treatment capacities within the scope of this Standard) may not be ne
35、cessary provided that the dimensions, hydraulics, mixing and filtering capabilities, and other applicable design characteristics are proportionately equivalent to the evaluated system. 2 Normative references The following documents contain provisions that, through reference in this text, constitute
36、provisions of this Standard. At the time of publication, the indicated editions were valid. All standards are subject to revision, and parties are encouraged to investigate the possibility of applying the recent editions of the standards indicated 2018 NSF NSF/ANSI 40 2018 2 below. American Public H
37、ealth Association (APHA), American Water Works Association (AWWA) periodic cleaning or replacement of components and removal of residuals as required by the manufacturer in the operations and maintenance manual; NOTE Periodic refers to all procedures specified in the manufacturers operation and main
38、tenance manual that must be performed within intervals of two years. visual inspection and sampling as required by the manufacturer in the operations and maintenance manual, including a means for collecting a representative effluent sample and determining the need for residuals removal; and removal
39、(manually or by pumping) of collected residuals as required by the manufacturer in the operations and maintenance manual. If the operations and maintenance manual describes a means to determine the need to remove residuals from a chamber without ground-level access, then only the ability to install
40、ground-level access shall be required. Systems without ground-level access to a chamber shall be equipped with a means to locate the opening to the chambers. This information shall be provided on or in a ground-level access opening. 5.7.2 Access ports shall be protected against unauthorized intrusio
41、ns. Acceptable protective measures include, but are not limited to: a padlock; a cover that can be removed only with specialized tools; or a cover having a minimum net weight of 29.5 kg (65 lb). 5.8 Failure sensing and signaling equipment The system shall possess a mechanism or process capable of de
42、tecting failures of electrical and mechanical components critical to the treatment processes and delivering a visible and audible signal to notify the owner or user of the failure. The system shall possess a mechanism or process capable of detecting a high water condition and delivering a visible an
43、d audible signal to notify the owner or user that the water level is above normal operating specifications. Compliance with the requirements of Sections 5.8.1 and 5.8.2 shall be determined by a group of three observers. Observers shall be employees of the test agency. The visual and auditory signals
44、 shall continue to be functional in the event of an electrical, mechanical, or hydraulic malfunction of the system providing power is available to the system and shall resume once power is restarted following the power outage. This does not mandate a battery back-up for the alarm system. 5.8.1 Visua
45、l alarm test The audible portion of the alarm shall be disabled during the visual alarm test. The visual portion of the signal shall be conspicuous from a distance of 15 m (50 ft). There shall be a minimum of five random on/off trials of the visual alarm. The observers shall turn their backs to the
46、alarm panels such that they cannot see the visual portion of the alarm prior to each trial during the visual alarm test. The visual alarm shall be on for a minimum of one trial and off for a minimum of one trial during the test but the on/off 2018 NSF NSF/ANSI 40 2018 6 condition shall otherwise be
47、selected randomly. Observers shall face the alarm panel when requested during the test. Compliance with these requirements is demonstrated only when all observers provide the correct answer for each trial. 5.8.2 Audible alarm test The visual alarm shall be disabled during the audible alarm test. Obs
48、ervers shall have their backs to the alarm during the audible testing. The audible portion of the signal shall be discernible from a distance of 15 m (50 ft) with a minimum ambient noise level of 60 dbA. When the ambient noise level is less than 60 dbA, it shall be augmented with a steady tone betwe
49、en 100 and 1000 hertz. The ambient noise level shall be measured at the location where the observers will be located. The audible alarm shall be activated a minimum of 3 times. The observers shall record the number of times the audible alarm was heard. Compliance with these requirements is demonstrated only when all observers record the correct number of times the alarm was activated. The audible portion of the alarm shall not exceed 90 dbA at a distance of 3 m (10 ft) when measured outdoors with both the alarm panel and sound level meter located a
