1、ASME A112.19.10-2003(Revision of ASME A112.19.10-1994)DUAL FLUSHDEVICES FOR WATER CLOSETSAN AMERICAN NATIONAL STANDARDIntentionally left blank AN AMERICAN NATIONAL STANDARDDUAL FLUSHDEVICES FORWATER CLOSETSASME A112.19.10-2003(Revision of ASME A112.19.10-1994)Date of Issuance: July 15, 2003The 2003
2、edition of this Standard is being issued with an automatic addenda subscription service.The use of an addenda allows revisions made in response to public review comments or committeeactions to be published as necessary. The next edition of this Standard is scheduled for publicationin 2008.ASME issue
3、s 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 Engineer
4、s.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. T
5、he proposed code or standard was madeavailable for public review and comment that provides an opportunity for additional public input from industry, academia,regulatory agencies, and the public-at-large.ASME does not “approve,” “rate,” or “endorse” any item, construction, proprietary device, or acti
6、vity.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 assumes any suc
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8、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
9、 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 2003 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rig
10、hts reservedPrinted in U.S.A.CONTENTSForeword ivCommittee Roster . vCorrespondence With the A112 Committee . vi1 General 12 General Requirements 13 Testing 24 Labeling . 4Nonmandatory AppendixA Optional Test for Determination of Performance at Maximum Water Savings 5iiiFOREWORDThe purpose of this St
11、andard is to establish a nationally recognized standard for dual flushdevices to achieve volumetric water saving performance for water closets. This Standard providesguidance to manufacturers, distributors, purchasers, and jurisdiction officials, specifiers, or waterutility planners for water conser
12、vation, to promote better understanding between suppliers andusers, and to furnish a basis for fair competition in furnishing such products to meet the principaldemands of the trade.This Standard includes a series of tests for dual flush devices for modification of the flushvolume from installed wat
13、er closets and newly manufactured water closets that use 3.5 gal perflush or a greater volume, to reduce water consumption, that may apply such control options toprovide two distinctive modes of operation. The devices considered to be covered in this Standardare those required to provide at least a
14、30% reduction in water consumption in the reduced flushmode and still meet the required performance levels of the Standard.The reduction in water closet flush volume discharges that may be made by a variety oftechniques, other than one or another single motion selector actuation and leaving the unit
15、, arenot covered by this Standard. Other active or passive techniques, or methods not covered, include,but are not restricted to: installation of dams; displacement volume containers; cylindrical orother shaped water barrier containment elements; and hand-held observer, evaluator, and/orcontrols for
16、 termination of the flush.The tests specified in this Standard for the removal of liquid wastes and toilet tissues, or othercomparable waste loads, are derived from industry experience, from field unit installations,independent laboratory evaluations by the methods included herein, and research stud
17、ies. Theendeavor accounts for service requirements that are necessary for the sanitary protection providedby water closets and water conservation achievable through the installation of these devices. Thetests presented are from demonstrated applications by competent laboratory personnel and fromothe
18、r standards applications giving results of suitable reproducibility for the purposes intended.This revision of the 1994 edition has changed the performance requirements to provide for anacceptable amount of leakage. In addition, soft metric conversion of the U.S. customary unitshas been added and a
19、number of minor editorial errors have been corrected.Suggestions for improvement of this Standard will be welcome. They should be sent to TheAmerican Society of Mechanical Engineers; Attn: Secretary, A112 Standards Committee; ThreePark Avenue, New York, NY 10016.This Standard was approved as an Amer
20、ican National Standard on February 26, 2003.ivASME A112 STANDARDS COMMITTEEStandardization of Plumbing Materials and Equipment(The following is the roster of the Committee at the time of approval of this Standard.)OFFICERSS. A. Remedios, Vice ChairC. J. Gomez, SecretaryCOMMITTEE PERSONNELR. H. Ackro
21、yd, ConsultantJ. A. Ballanco, JB Engineering however, they should not contain proprietary names or infor-mation.Requests that are not in this format will be rewritten in this format by the Committeeprior to being answered, which may inadvertently change the intent of the original request.ASME proced
22、ures provide for reconsideration of any interpretation when or if additionalinformation that might affect an interpretation is available. Further, persons aggrieved byan interpretation may appeal to the cognizant ASME Committee or Subcommittee. ASMEdoes not “approve,” “certify,” “rate,” or “endorse”
23、 any item, construction, proprietarydevice, or activity.Attending Committee Meetings. The A112 Standards Committee schedules meetingsas needed, which are open to the public. Persons wishing to attend any meeting shouldcontact the Secretary of the A112 Standards Committee. The A112 home page contains
24、information on future meeting dates and locations.viASME A112.19.10-2003DUAL FLUSH DEVICES FOR WATER CLOSETS1 GENERAL1.1 ScopeThis Standard covers physical and performancerequirements and test methods pertaining to dual flushdevices that are installed within water closet tanks whichuse 3.5 gpf (13.2
25、 Lpf) or greater volume, to reduce totalvolumetric water consumption.1.2 Units of MeasurementValues are stated in U.S. customary units and in theInternational System of Units (SI). The U.S. customaryunits shall be considered as the standard.In this Standard, gallons per flush is abbreviated gpfand l
26、iters per flush is abbreviated Lpf.1.3 ReferencesThe following documents form a part of this Standardto the extent specified herein. Unless otherwise speci-fied, the latest edition shall apply.ASME A112.19.2M, Vitreous China Plumbing FixturesASME A112.19.6, Hydraulic Performance Requirementsfor Wate
27、r Closets and UrinalsPublisher: The American Society of Mechanical Engi-neers (ASME International), Three Park Avenue, NewYork, NY 10016; Order Department: 22 Law Drive,Box 2300, Fairfield, NJ 070071.4 Definitionscycle time: the time beginning at the instant the flushrelease device is operated, and
28、ending at the instant thewater supply valve is completely shut off and the waterstops flowing.dual flush device: a mechanism for control of water closetdischarge that provides the user with two options forselective operation with either a normal fill volume ora reduced volume of water from the tank.
29、 The dual flushdevices are considered to be those which are capable ofproviding at least 30% reduction in water consumption.Only activation by selection of one option by the user,and a release of the actuation selector, without requiringfurther action or holding by the user, shall be required.User i
30、nvolvement devices that require further action orholding of the selector control to participate in the pro-cess of maintaining the selected operation mode andflush (single-option flush modifying devices or rapidclosure devices) are not covered in this Standard.1flapper valve: see flush valve.flow pr
31、essure: the pressure in the water supply pipe atthe fixture fitting, valve, or water inlet while the fittingvalve or water outlet is flowing.flush tank (gravity type): a device that stores a specifiedquantity of water. When actuated, it discharges thequantity of water, plus some through-flow from th
32、epotable water supply or other acceptable water sourcefor the water closet sanitary service, into the water closetbowl or urinal by gravity. It is often a container for ameasured quantity of water, fitted with an inlet valve(ball cock) and a flush valve, and is either wall-hung orclose-coupled (with
33、 closet bowl).flush valve: a special form of valve located at the bottomof a flush tank used to control the discharge of waterfrom the tank into a water closet or urinal.sanitary: reasonably acceptable appearance and not nec-essarily microbiologically clean.water closet: a plumbing fixture having a
34、water-containing receptor that receives liquid and solid bodywaste and, upon actuation, conveys the waste throughan exposed integral trap seal into a gravity drainagesystem.water savings: the amount of flush volume water reduc-tion in gallons or percentage when comparing consump-tion with and withou
35、t a dual flush device for a watercloset.water surface: the surface of the still water in the watercloset bowl when filled to the trap weir.2 GENERAL REQUIREMENTS2.1 Functional OperationWhen designed for installation in a gravity-type flushtank, the dual flush device shall fit within the tankpunching
36、 without interference with other operatingparts, except for the specific design requirements formodification of the function and operation, with freemovement of all parts. Inserts and attachments withinthe tank shall not restrict the movement or operation ofall parts, except for specific limits purp
37、osely intendedby the design and operating needs of the device(s). Theuser shall be required to activate the function by actua-tion of the selector control or handle and release; theselected flush mode shall be completed without requir-ing further action or holding by the user.ASME A112.19.10-2003 DU
38、AL FLUSH DEVICES FOR WATER CLOSETS2.2 DurabilityThe product shall meet the performance requirementsof the cycle test in para. 3.2. Materials that are immersedin or exposed to water in the tank shall conform torequirements for longevity and resistance to corrosion,adsorption, and dimensional stabilit
39、y.2.3 Hydraulic PerformanceSeparate dual flush devices installed in water closettanks shall meet the hydraulic performance tests in para.3.3 when tested on two of three different selected sampleproduct water closets submitted for tests or providedby the testing laboratory. If failure of any of the t
40、estsoccurs, the third water closet and a new dual flushassembly shall be tested. Any added failures of eitherassembly and/or performance failure of the water closetshall be cause for rejection of the device. Label restric-tions on the installation of the device(s) to any singleor group of manufactur
41、ers water closets shall be speci-fied on a distinctive color caution label on the packageor instructions by the manufacturer, producer, or pro-vider of the device(s) in the event of demonstrated fail-ures for those models.3 TESTING3.1 Functional Operation Test3.1.1 Dual Flush Device Test Method. The
42、 dual flushdevice shall be installed and adjusted in accordance withthe manufacturers installation instructions in the watercloset tank(s) with volume of 3.5 gpf (13.2 Lpf) or greaterselected for test (of the three water closet product sam-ples provided). The dual flush handle or other actuationsele
43、ctor shall be independently operated to evaluatefreedom of parts to move when the fixture is emptyand normally filled, unless intrinsic design of the devicerequires constraints related to its functional per-formance.3.1.2 Performance Requirement. Parts shall not bindor seize when operated. Settings
44、according to the manu-facturers instructions should not cause leakage.3.2 Cycle Testing3.2.1 Cycle Testing of the Flush Valve Assembly3.2.1.1 Test Method. Install the flush valve in atank that contains a steady water supply and controlsthe water level to a maximum height of 7 14in. (178 6 mm), or as
45、 marked on the fixture tank if less, abovethe flush valve seat. Place a volume of water in the tankto the same water level height above the flush valveseat. Allow to stand for 60 3 min and observe anyleakage of water from the flush valve outlet. No leakageshall be observed. Conduct cycle testing by
46、opening andclosing the flush valve assembly for 75,000 continuouscycles. Tank walls may be dammed for accelerated tests2if the device and all associated hardware are immersedto represent actual installation conditions with thehydraulic head maintained.The full displacement of operating requirements
47、foreach mode of the openclose test cycles shall be to com-plete the full extent of the motion of parts to their normalfunctional stop locations. The entire drain and refillmodes need not be completed if the full displacement ofthe operating parts is achieved. The control mechanismshall be cycled in
48、both modes of operation for thenormal-flush and reduced-flush volume discharges with5:1 actuations as the ratio for the lower to larger flushdischarge; i.e., five consecutive reduced flushes and onenormal flush.Upon completion of the cycling period, remove anydams and water from the tank. Place a vo
49、lume of waterin the tank to the previous water level height above theflush valve seat. Allow to stand for 60 3 min andobserve any leakage of water from the flush valve outlet.3.2.1.2 Performance Requirement. Not more than2% of the total measured volume of water in the tankshall leak from the flush valve outlet after the cyclingis completed and the unit is allowed to stand for 60 3 min.3.2.1.3 Cycle Testing of the Flapper Valve. The testmethod and performance requirement of the flush valveassembly shall be conducted for devices that include aflapper valve as part of dual flush sy
