1、ASME A112.1.3-2000AIR GAP FITTINGS FOR USE WITH PLUMBING FIXTURES,APPLIANCES, ANDAPPURTENANCESAN AMERICAN NATIONAL STANDARDREAFFIRMED 2015FOR CURRENT COMMITTEE PERSONNELPLEASE E-MAIL CSasme.orgAN AMERICAN NATIONAL STANDARDAIR GAP FITTINGS FOR USE WITH PLUMBING FIXTURES,APPLIANCES, ANDAPPURTENANCESAS
2、ME A112.1.3-2000Date of Issuance: September 11, 2000This Standard will be revised when the Society approves the issuance ofa new edition. There will be no addenda or written interpretations of therequirements of this Standard issued to this edition.ASME is the registered trademark of The American So
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8、 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 2000 byTHE AMERICAN SOCIETY OF MECH
9、ANICAL ENGINEERSAll Rights ReservedPrinted in U.S.A.FOREWORDIndustry has often incorporated air gaps into commercial fittings to provide back siphonageand backflow protection for the water supply systems to which the fittings are connected.Designers of such fittings took guidance from documents such
10、 as ASME A112.1.2, butthere was not a national standard specifically directed toward fittings that included air gaps.In response to requests to modify ASME A112.1.2 to specifically cover fittings with airgaps, the ASME A112 Main Committee determined that the better course was to developa separate st
11、andard for this purpose. A Project Team was created, and this Standard is theresult of that work.Suggestions for improvement of this Standard are welcomed. They should be sent to TheAmerican Society of Mechanical Engineers; Attn: Secretary, A112 Main Committee; ThreePark Avenue, New York, NY 10016.T
12、his Standard was approved as an American National Standard on July 5, 2000.iiiASME STANDARDS COMMITTEE A112Standardization of Plumbing Materials and Equipment(The following is the roster of the Committee at the time of approval of this Standard.)OFFICERSP. J. Higgins, ChairS. A. Remedios, Vice Chair
13、C. J. Gomez, SecretaryCOMMITTEE PERSONNELR. H. Ackroyd, Rand EngineeringJ. A. Ballanco, JB Engineering 0.5 gpm (1.892 L/min) for maximumAIR GAP FITTINGS FOR USE WITH PLUMBING FIXTURES,APPLIANCES, AND APPURTENANCES ASME A112.1.3-2000rated flow between 1 and 10 gpm (3.785 and 37.85L/min); 2 gpm (7.570
14、 L/min for flow rated from greaterthan 10 gpm (37.85 L/min) up to 20 gpm (75.70 L/min); and 5 gpm (18.92 L/min) for flow rated greaterthan 20 gpm (75.70 L/min).5.3.2 Any entrance of water into the sight tube shallbe cause for rejection of the device.5.4 Back Pressure Test5.4.1 This test shall be con
15、ducted on air gap fittingswhich are rated by their manufacturer to protect againstbackflow into the outlet of the fitting. With the fittinginstalled in accordance with the manufacturers installa-tion instructions, the manufacturers maximum ratedback pressure or backflow shall be applied. The flowsha
16、ll be maintained at least 20 sec after the height ofback flowing water stabilizes. Verify that during thistest that the water does not rise above the manufacturerscritical level mark on the fitting.35.4.2 Water above the critical level mark shall because for rejection of the fitting.6 MARKINGSAir ga
17、p fittings shall be permanently marked withthe following information:(a) the manufacturers name or trademark.(b) the manufacturers model number.(c) the manufacturers critical level mark.(d) “inlet” or “outlet” or flow direction. If the fittinghas multiple inlets, all inlets shall be marked.7 INSTALL
18、ATION INSTRUCTIONSInstallation instructions that describe the proper instal-lation of the fitting with respect to the critical leveland to the orientation required for the fitting to complywith the performance tests of Section 5 shall be providedwith the fitting. Manufacturers literature shall inclu
19、dethe maximum rated flow to the inlet(s) and any backpressure or back flow rating.ASME STANDARDS RELATED TO PLUMBINGAir Gaps in Plumbing Systems A112.1.2-1991(R1998)Air Gap Fittings for Use With Plumbing Fixtures, Appliances, and AppurtenancesA112.1.3-2000Performance Standard and Installation Proced
20、ures forStainless Steel Drainage Systems for Sanitary, Storm, andChemical Applications, Above and Below Ground .A112.3.1-1993Water Heater Relief Valve Drain Tubes A112.4.1-1993(R1998)Plastic Fittings for Connecting Water Closets to theSanitary Drainage System A112.4.3-1999Floor-Affixed Supports for
21、Off-the-Floor Plumbing Fixtures forPublic UseA112.6.1M-1997Backwater Valves A112.14.1-1975(R1998)Plumbing Fixture Fittings . A112.18.1-2000Performance Requirements for Backflow Protection Devicesand Systems in Plumbing Fixture Fittings A112.18.3M-1996Flexible Water Connectors A112.18.6-1999Deck-Moun
22、ted Bath/Shower Transfer ValvesWith Integral Backflow Protection . A112.18.7-1999Enameled Cast Iron Plumbing Fixtures .A112.19.1M-1994(R1999)Vitreous China Plumbing Fixtures A112.19.2M-1998Stainless Steel Plumbing Fixtures (Designed forResidential Use) .A112.19.3M-1987(R1996)Porcelain Enameled Forme
23、d Steel Plumbing Fixtures.A112.19.4M-1994(R1999)Trim for Water-Closet Bowls, Tanks, and Urinals A112.19.5-1999Hydraulic Performance Requirements for Water Closets and Urinals . A112.19.6-1995Whirlpool Bathtub Appliances .A112.19.7M-1995Suction Fittings for Use in Swimming Pools, Wading Pools,Spas, H
24、ot Tubs, and Whirlpool Bathtub Appliances A112.19.8M-1987(R1996)Non-Vitreous Ceramic Plumbing Fixtures.A112.19.9M-1991(R1998)Dual Flush Devices for Water Closets A112.19.10-1994Wall Mounted and Pedestal Mounted, Adjustable and PivotingLavatory and Sink Carrier Systems. A112.19.12-2000Floor Drains .A
25、112.21.1M-1991(R1998)Roof DrainsA112.21.2M-1983Hydrants for Utility and Maintenance Use A112.21.3M-1985(R1995)Cleanouts .A112.36.2M-1991(R1998)The ASME Publications Catalog shows a complete list of all the Standards published bythe Society. For a complimentary catalog, or the latest information abou
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