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18、A Group Plumbing fittingsDecember 2012 1B125.3-12Plumbing fittings1Scope1.1This Standard covers plumbing fittings, including the following:(a) anti-siphon fill valves;(b) automatic compensating valves other than those for individual wall-mounted showering systems;(c) flushometer valves and solenoid
19、valves;(d) supply line stops;(e) temperature-actuated in-line mixing valves;(f) thermal expansion relief valves; and(g) trap primers.1.2This Standard does not cover the following plumbing supply fittings and accessories, which are covered by ASME A112.18.1/CSA B125.1:(a) automatic compensating valve
20、s for individual wall-mounted showering systems;(b) bath and shower supply fittings;(c) bidet supply fittings;(d) clothes washer supply fittings;(e) drinking fountain supply fittings;(f) humidifier supply stops;(g) kitchen, sink, and lavatory supply fittings;(h) laundry tub supply fittings;(i) lawn
21、and sediment faucets;(j) metering and self-closing supply fittings; and(k) supply stops.1.3This Standard does not cover(a)plumbing waste fittings, which are covered by ASME A112.18.2/CSA B125.2;(b) flexible water connectors under continuous pressure, which are covered by ASME A112.18.6/CSA B125.6; a
22、nd(c) pipes and tubes or pipe and tube fittings.1.4In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; “should” is used to express a recommendation or that which is advised but not required; and “may”
23、 is used to express an option or that which is permissible within the limits of the standard.Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.Notes to table
24、s and figures are considered part of the table or figure and may be written as requirements.Annexes are designated normative (mandatory) or informative (nonmandatory) to define their application. B125.3-12 2012 CSA Group2 December 20121.5SI units are the units of record in Canada. In this Standard,
25、the inch/pound units are shown in parentheses.The values stated in each measurement system are equivalent in application; however, each system is to be used independently. Combining values from the two measurement systems can result in non-conformance with this Standard.All references to gallons are
26、 to U.S. gallons.For information on the conversion criteria used in this Standard, see Annex A.2 Reference publicationsThis Standard refers to the following publications, and where such reference is made, it shall be to the edition listed below, including all amendments published thereto.ASME/CSA Gr
27、oup (The American Society of Mechanical Engineers)ASME A112.18.1-2012/CSA B125.1-12Plumbing supply fittingsASME A112.18.2-2011/CSA B125.2-11Plumbing waste fittingsASME A112.18.6-2009/CSA B125.6-09Flexible water connectorsASME A112.19.2-2008/CSA-B45.1-08Ceramic plumbing texturesASSE/ASME/CSA Group (A
28、merican Society of Sanitary Engineering/The American Society of Mechanical Engineers)ASSE 1016-2011/ASME A112.1016-2011/CSA B125.16-11Performance requirements for automatic compensating valves for individual showers and tub/shower combinationsASME (The American Society of Mechanical Engineers)A112.1
29、.2-2004Air Gaps in Plumbing Systems (for Plumbing Fixtures and Water-Connected Receptors)A112.18.3-2002 (R2008)Performance Requirements for Backflow Protection Devices and Systems in Plumbing Fixture FittingsB1.1-2003 (R2008)Unified Inch Screw Threads, (UN and UNR Thread Form)B1.20.1-1983 (R2006)Pip
30、e Threads, General Purpose, InchB1.20.7-1991 (R2008)Hose Coupling Screw Threads, InchB16.18-2001 (R2005)Cast Copper Alloy Solder Joint Pressure FittingsB16.22-2001 (R2005)Wrought Copper and Copper Alloy Solder Joint Pressure Fittings 2012 CSA Group Plumbing fittingsDecember 2012 3ASSE (American Soci
31、ety of Sanitary Engineering)1017-2003Performance Requirements for Temperature Actuated Mixing Valves for Hot Water Distribution Systems1061-2006Performance Requirements for Removable (b) without removing the piping from the body;(c) without disturbing the finished wall; and(d) using standard tools o
32、r manufacturer-provided tools.B125.3-12 2012 CSA Group6 December 20124.5 Solder jointsThe dimensions of solder joint ends for connection to copper tubes or fittings (other than factory-assembled parts) shall comply with ASME B16.18 or ASME B16.22, as applicable.4.6 ThreadsPipe threads shall comply w
33、ith ASME B1.20.1 and hose threads shall comply with ASME B1.20.7.4.7 Flared and ball sleeve (compression) tube fittingsThe screw thread dimensions of flared and ball sleeve (compression) tube fittings shall comply with ASME B1.1.4.8 Accessible designsOperating controls intended for use in accessible
34、 designs shall(a)be automatically controlled; or(b) meet the following requirements:(i) be operable with one hand;(ii) not require tight grasping, pinching, or twisting of the wrist; and(iii) require an operating force not greater than the applicable value specified in Table 1.4.9 Flushometer valves
35、The pipe sizes and inlet connections for flushometer valves shall be specified by the manufacturer.4.10 Temperature-actuated mixing valvesTemperature-actuated mixing valves shall comply with the performance requirements of ASSE 1017.4.11 Backflow preventionFittings shall be designed to protect the p
36、otable water supply from contamination due to backflow by a means that complies with the applicable requirements of Clause 5.9.Diverting and anti-siphoning devices incorporated into a fitting shall be removable for cleaning, repair, and replacement.4.12 Automatic compensating valves and temperature-
37、limiting devices4.12.1 Automatic compensating valvesAutomatic compensating valves (other than those for individual wall-mounted showering systems, which are covered in ASME A112.18.1/CSA B125.1 by ASSE 1016/ASME A112.1016/CSA B125.16) shall be equipped with a means that limits (sets) the maximum tem
38、perature of the valve and shall comply with this Standard.4.12.2 Automatic temperature-limiting devicesNote: Automatic temperature-limiting devices are intended to reduce the risk of scalding and are not intended to protect against thermal shock. These devices can be separate from or integral with p
39、lumbing supply fittings.4.12.2.1In addition to the requirements specified in Clauses 4.12.2.2, 4.12.2.3, and 5.7.6, automatic temperature limiting devices shall comply with all other applicable requirements of this Standard.4.12.2.2Automatic temperature-limiting devices shall be provided with a(a)fi
40、xed (non-adjustable) temperature setting; or(b) temperature setting that can be 2012 CSA Group Plumbing fittingsDecember 2012 7(i) adjusted and locked in position; or(ii) protected, by use of a tool, against user access.4.12.2.3Automatic temperature-limiting devices shall be provided with check valv
41、es or other means of preventing cross-flow that comply with Clause 5.3.3.4.13 Cover plates and escutcheonsCover plates and escutcheons for concealed and deck-mounted supply fittings shall have dimensions that allow them to conceal a circular area with a diameter of not less than 44 mm (1.73 in).4.14
42、 MaterialsCoupling nuts and locknuts shall be made from(a)copper alloys with 56% minimum copper content;(b) stainless steel alloys of the 300 or 400 series;(c) plastics; or(d) materials that comply with Clause 5.11 of ASME A112.18.1/CSA B125.1.4.15 Toxicity and lead content4.15.1Fittings covered by
43、this Standard shall comply with the applicable requirements of NSF/ANSI 61.4.15.2Solders and fluxes in contact with potable water shall not exceed, by mass, 0.2% lead content. Metal alloys in contact with potable water shall not exceed 8% lead content.4.15.3Fittings intended to convey or dispense wa
44、ter for human consumption through drinking or cooking shall not contain a weighted average lead content in excess of 0.25% when evaluated in accordance with the test method in NSF/ANSI 372.4.16 Trap primers4.16.1Trap primers should activate between 140 kPa and 860 kPa (20 psi and 125 psi).4.16.2Conn
45、ections leading into and out of a trap primer shall be at least NPS-1/2.4.16.3In response to flow or pressure changes in the supply line, a trap primer shall provide intermittent discharge of water through its secondary outlet to a trap. See Figure1.4.16.4A trap primer shall prevent back siphonage t
46、hrough its secondary outlet in accordance with Clause 5.9.3.4.17 Fittings incorporating electrical featuresElectrical power to fittings incorporating electric features shall be supplied in accordance with Clause 4.13 of ASME A112.18.1/CSA B125.1.B125.3-12 2012 CSA Group8 December 20124.18 Dimensions
47、4.18.1 Anti-siphon fill valves4.18.1.1 DimensionsThe dimensions of the shank on a anti-siphon fill valve shall be as shown in Figure2.4.18.1.2 Bowl refill tubeThe bowl refill tube, when supplied, shall be sufficiently rigid to maintain its installed position. If a clamping device is used, it shall n
48、ot obstruct a cross-sectional area of the tank overflow tube of more than 20 mm2(0.031 in2).4.19 Cross-flowFittings that have integral flow control devices downstream of the primary shut-off valves that completely shut off the flow of water shall have check valves installed in the fitting to prevent
49、 cross-flow. These check valves shall comply with Clause 5.3.3.4.20 Push-fit fittingsConnections achieved by push-fit fittings shall comply with ASSE 1061.5 Performance requirements and test procedures5.1 General5.1.1 PreconditioningBefore testing, specimens shall be conditioned at ambient laboratory conditions for at least 12 h.5.1.2 Installation for testingFor test purposes, specimens shall be installe
