14-1_Edtn_2003.pdf

ASME A112.14.1-2003(Revision of ANSI A112.14.1M-1975)BACKWATERVALVESA N A M E R I C A N N A T I O N A LS T A N D A R DASME A112.14.1-2003(Revision of ANSI A112.14.1M-1975)BACKWATERVALVESA N A M E R I C A N N A T I O N A LS T A N D A R DCopyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.ANAMERICANNATIONALSTANDARDBACKWATERVALVESASMEA112.14.1-2003(RevisionofANSIA112.14.1M-1975)Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.Date of Issuance:March 5,2004The next edition of this Standard is scheduled for publication in 2008.There will be no addendaissued to this edition.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard.Interpretations are published on the ASME Web site under the Committee Pages at http:/www.asme.org/codes/as they are issued.ASME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was developed under procedures accredited as meeting the criteria for American NationalStandards.The Standards Committee that approved the code or standard was balanced to assure that individuals fromcompetent and concerned interests have had an opportunity to participate.The proposed code or standard was madeavailableforpublicreviewandcommentthatprovidesanopportunityforadditionalpublicinputfromindustry,academia,regulatory agencies,and the public-at-large.ASME does not“approve,”“rate,”or“endorse”any item,construction,proprietary device,or activity.ASME does not take any position with respect to the validity of any patent rights asserted in connection with anyitems mentioned in this document,and does not undertake to insure anyone utilizing a standard against liability forinfringement of any applicable letters patent,nor assume any such liability.Users of a code or standard are expresslyadvised that determination of the validity of any such patent rights,and the risk of infringement of such rights,isentirely their own responsibility.Participation by federal agency representative(s)or person(s)affiliated with industry is not to be interpreted asgovernment or industry endorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the establishedASME procedures and policies,which precludes the issuance of interpretations by individuals.No part of this document may be reproduced in any form,in an electronic retrieval system or otherwise,without the prior written permission of the publisher.The American Society of Mechanical EngineersThree Park Avenue,New York,NY 10016-5990Copyright 2004 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.CONTENTSForeword.ivCommittee Roster.vCorrespondence With the A112 Committee.vii1General.12Requirements.23Testing.64Marking.6Figures1Combination Floor Drain and Backwater Valve.32Floor Drain With Adjustable Strainer and Backwater Valve.33Floor Drain With Tractor Grate and Backwater Valve.34Normally Open Backwater Valve.35Nonmetallic Vertical Backwater Valve.36Nonmetallic Backwater Valve With Access Sleeve.47Nonmetallic Horizontal Backwater Valve.4Tables1Dimensions for Horizontal Backwater Valves.22Dimensions for Combination Horizontal Backwater Valveand Manual Gate Valves.43Dimensions for Terminal Backwater Valves.5iiiCopyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.FOREWORDThe American National Standards Committee A112,Plumbing Materials and Equipment,wasestablished on July 27,1955.Its first organizational meeting was held on July 22,1958,and PanelNo.14 was created on May 1,1964,to establish standards for interceptors,separators,andbackwater valves.Its charter was as follows:the recommendation of suitable existing standardsincooperation withinterested sponsors,or thedevelopment ofadequate newstandards asneededfor interceptors,separators,and backwater valves as used or installed in plumbing systems.The A112 Committee underwent a number of organizational changes over the years and iscurrently identified as ASME Standards Committee A112.Its Panel 14 working group,with theresponsibility for backwater valves,was redesignated Project Team 14.1.The Project Team mettwice to prepare this revision,which now includes criteria from the International Association ofPlumbing and Mechanical Officials(IAPMO)Product Standard 38