加拿大水暖规范

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PART 7  PLUMBING 布管系统

Section 7.1. General 总则
7.1.1. Scope 范围
7.1.2. Application 应用
7.1.3. Definitions 定义
7.1.4. Plumbing Facilities 管道设施
7.1.5. Service Connections 进户连接
7.1.6. Location of Fixtures 设备的位置

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Section 7.2. Materials and Equipment 材料和设备
7.2.1. General 概述
7.2.2. Fixtures 器具
7.2.3. Traps and Interceptors 疏流阀和节流器
7.2.4. Pipe Fittings 管道配件
7.2.5. Non-Metallic Pipe and Fittings 非金属管及配件
7.2.6. Ferrous Pipe and Fittings 铁管和配件
7.2.7. Non-Ferrous Pipe and Fittings 非铁管及配件
7.2.8. Corrosion Resistant Materials 耐腐蚀材料
7.2.9. Jointing Materials 焊接材料
7.2.10. Miscellaneous Materials 杂项材料
7.2.11. Water Service Pipes and Fire Service Mains 进户水管和消防供水

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Section 7.3. Piping 布管
7.3.1. Application 应用
7.3.2. Construction and Use of Joints 接头的构造和使用
7.3.3. Joints and Connections 接头及连接
7.3.4. Support of Piping 布管的支撑
7.3.5. Protection of Piping 布管的保护
7.3.6. Testing of Drainage and Venting Systems 排水和排气系统的测试
7.3.7. Testing of Potable Water Systems 饮用水系统的测试

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Section 7.4. Drainage Systems 排水系统
7.4.1. Application 应用
7.4.2. Connections to Drainage Systems 排水系统的连接
7.4.3. Location of Fixtures 排水设备的位置
7.4.4. Treatment of Sewage and Wastes 污水和废物处理
7.4.5. Traps 疏流
7.4.6. Arrangement of Drainage Piping 排水管道的安排
7.4.7. Cleanouts 清淤
7.4.8. Minimum Slope and Length of Drainage Pipes 排水管的最小坡度和长度
7.4.9. Size of Drainage Pipes 排水管的大小
7.4.10. Hydraulic Loads 水力负荷

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Section 7.5. Venting Systems 排气系统
7.5.1. Vent Pipes for Traps 疏水阀的排气管
7.5.2. Wet Venting 湿排气
7.5.3. Circuit Venting 线路排气
7.5.4. Vent Pipes for Soil or Waste Stacks 生活污物或废料排气管道
7.5.5. Miscellaneous Vent Pipes 杂项排气管
7.5.6. Arrangement of Vent Pipes 排气管的布置
7.5.7. Minimum Size of Vent Pipes 排气管的最小尺寸
7.5.8. Sizing of Vent Pipes 排气管的大小
7.5.9. Air Admittance Valves 吸气阀

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Section 7.6. Potable Water Systems 饮用水系统
7.6.1. Arrangement of Piping 管道的安排
7.6.2. Protection from Contamination 保护免受污染
7.6.3. Size and Capacity of Pipes 管的尺寸和容量
7.6.4. Water Efficiency 用水效率
7.6.5. Water Temperature Control 水温控制

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Section 7.7. Non-Potable Water Systems 非饮用水系统
7.7.1. Connection 连接
7.7.2. Identification 鉴别
7.7.3. Location 位置

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Section 7.1. General

7.1.1. Scope
7.1.1.1. Scope
(1) The scope of this Part shall be as described in Subsection 1.1.2. of Division A.

7.1.2. Application
7.1.2.1. Application
(1) Except as provided in Sentence (2), this Part applies to the design and construction of plumbing.
(2) This Part does not apply to industrial process systems unless the industrial process system is interconnected with the plumbing system, in which case the interconnection shall be so designed and installed so that the plumbing system is protected against contamination or malfunction that may be caused by the industrial system.

7.1.3. Definitions
7.1.3.1. Definitions
(1) In this Part, Storey means the interval between two successive floor levels including mezzanine floors that contain plumbing or between a floor level and roof.

7.1.4. Plumbing Facilities
7.1.4.1. Facilities Required
(1) Plumbing facilities shall be provided in accordance with Subsection 3.7.4. and Section 9.31.

7.1.4.2. Floor Drains
(1) Where gravity drainage to a sanitary drainage system is possible, a floor drain shall be installed in a basement forming part of a dwelling unit.
(2) Where gravity drainage to a sanitary drainage system is not possible, the floor drain required by Sentence (1) may be connected to a storm drainage system, dry well or drainage ditch provided it is located where it can receive only clear water waste or storm sewage.
(3) A floor drain shall be provided in a public laundry room, garbage room, incinerator room, boiler or heating room that is not located within a dwelling unit.

7.1.5. Service Connections
7.1.5.1. Sanitary Drainage Systems
(1) Every sanitary drainage system shall be connected to a public sanitary sewer, a public combined sewer or a private sewage disposal system.
(2) A combined building drain or a combined building sewer shall not be installed.

7.1.5.2. Storm Drainage Systems
(1) Every storm drainage system shall be connected to a public storm sewage works, a public combined sewage works or a designated storm water disposal location but shall not be connected to a sanitary sewage works.

7.1.5.3. Water Distribution Systems
(1) Except as provided in Sentence (2), every water distribution system shall be connected,
to a watermain that is part of a municipal drinking water system, or
to a drinking water system, if a watermain described in Clause  is not available.
(2) Storm sewage or greywater that is free of solids may be used for the flushing of water closets, urinals or the priming of traps.
(3) Piping conveying the non-potable water described in Sentence (2) shall be installed in conformance with Section 7.7.

7.1.5.4. Separate Services
(1) Piping in any building shall be connected to the public services separately from piping of any other building, except that an ancillary building on the same property may be served by the same service.
(2) No plumbing serving a dwelling unit shall be installed in or under another unit of the building unless the piping is located in a tunnel, pipe corridor, common basement or parking garage, so that the piping is accessible for servicing and maintenance throughout its length without encroachment on any private living space, but this Sentence does not prevent plumbing serving a unit located above another unit from being installed in or under the lower unit.

7.1.5.5. Private Sewers and Private Water Supply
(1) Private sewers and private water supply pipes shall be installed according to MOE, “Guidelines for the Design of Sanitary Sewage Systems, Guidelines for the Design of Storm Sewer Systems, Guidelines for the Design of Water Distribution Systems and Guidelines for Servicing in Areas Subject to Adverse Conditions”.

7.1.6. Location of Fixtures
7.1.6.1. Lighting and Ventilation Requirements
(1) Plumbing fixtures shall not be installed in a room that is not lighted and ventilated in accordance with the appropriate requirements in Parts 3 and 9.

7.1.6.2. Accessibility
(1) Every fixture, plumbing appliance, interceptor, cleanout, valve, device or piece of equipment shall be so located that it is readily accessible for use, cleaning and maintenance.

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Section 7.2. Materials and Equipment

7.2.1. General
7.2.1.1. Exposure of Materials
(1) Where unusual conditions exist such as excessively corrosive soil or water, only materials suited for use in such locations shall be used.
(2) Materials and equipment used in a drainage system where excessively corrosive wastes are present shall be suitable for the purpose.

7.2.1.2. Restrictions on Re-Use
(1) Used materials and equipment, including fixtures, shall not be reused unless they meet the requirements of this Part for new materials and equipment and are otherwise satisfactory for their intended use.
(2) Materials and equipment that have been used for a purpose other than the distribution of potable water shall not be subsequently used in a potable water system.

7.2.1.3. Identification and Certification
(1) Every length of pipe and every fitting shall have cast, stamped or indelibly marked on it the maker's name or mark and the weight or class or quality of the product, or it shall be marked in accordance with the relevant standard, and such markings shall be visible after installation.
(2) Where a component of a plumbing system is required by this Code to comply with a standard and the compliance is not certified by a testing agency accredited by the Standards Council of Canada for the testing of the component in question and, when an inspector requests proof of the compliance, proof of compliance shall be produced by the person proposing to install or have installed the component, and without such proof the component shall not be installed as a permanent part of any plumbing system.
(3) The lack of certification markings on a product or plumbing component shall be regarded as proof, in the absence of evidence to the contrary that no certification exists.
(4) If a component of a plumbing system is required to be certified to a standard, the certification shall be made by a testing agency accredited for that purpose by the Standards Council of Canada.

7.2.1.4. Pipe or Piping
(1) Where the term pipe or piping and fittings is used, it shall also apply to tube or tubing and fittings unless otherwise stated.

7.2.1.5. Withstanding Pressure
(1) Piping, fittings and joints used in pressure sewer, forcemain or sump pump discharge applications shall be capable of withstanding at least one and one-half times the maximum potential pressure.

7.2.2. Fixtures
7.2.2.1. Surface Requirements
(1) Except for the area designed to be slip proof in such fixtures, every exposed area of a fixture shall have a smooth, hard corrosion-resistant surface that is free from flaws and blemishes that may interfere with cleaning.

7.2.2.2. Conformance to Standards
(1) Every water closet and urinal shall conform to the requirements in Article 7.6.4.2.
(2) Every vitreous china fixture shall conform to CAN/CSA-B45.1, “Ceramic Plumbing Fixtures”.
(3) Every enamelled cast iron fixture shall conform to CAN/CSA-B45.2, “Enamelled Cast Iron Plumbing Fixtures”.
(4) Every porcelain enamelled steel fixture shall conform to CAN/CSA-B45.3, “Porcelain-Enamelled Steel Plumbing Fixtures”.
(5) Every stainless steel fixture shall conform to CAN/CSA-B45.4, “Stainless Steel Plumbing Fixtures”.
(6) Every plastic fixture shall conform to CAN/CSA-B45.5, “Plastic Plumbing Fixtures”.
(7) Every hydromassage bathtub shall conform to CAN/CSA-B45.10, “Hydromassage Bathtubs”.
(8) Every macerating toilet system for single bathrooms shall conform to CAN/CSA-B45.9, “Macerating Systems and Related Components”.

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7.2.2.3. Showers
(1) Every shower receptor shall be constructed and arranged so that water cannot leak through the walls or floor.
(2) Not more than 6 shower heads shall be served by a single shower drain.
(3) Where two or more shower heads are served by a shower drain, the floor shall be sloped and the drain located so that water from one head cannot flow over the area that serves another head.
(4) Except for column showers, when a battery of shower heads is installed, the horizontal distance between two adjacent shower heads shall be at least 750 mm.

7.2.2.4. Concealed Overflows
(1) A dishwashing sink and a food preparation sink shall not have concealed overflows.

7.2.2.5. Water Closets in Public Washrooms
(1) Except for Eastern-Style toilets, where a water closet is installed in a washroom for public use it shall be of the elongated type and provided with a seat of the open front type.

7.2.2.6. Lavatories
(1) A lavatory that does not have an overflow shall be equipped with a centre outlet waste fitting.

7.2.2.7. Trough Urinals
(1) No trough urinal shall be used as part of a plumbing system.

7.2.3. Traps and Interceptors
7.2.3.1. Traps
(1) Except as provided for in Sentence (2), every trap shall,
(a) have a trap seal depth of at least 38 mm,
(b) be so designed that failure of the seal walls will cause exterior leakage, and
(c) have a water seal that does not depend on the action of moving parts.
(2) The trap seal depth on fixtures draining to an acid waste system shall be a minimum of 50 mm.
(3) Every trap that serves a lavatory, a sink or a laundry tray shall,
(a) be provided with a cleanout plug of a minimum . in. size located at the lowest point of the trap and of the same material as the trap, except that a cast iron trap shall be provided with a brass cleanout plug, or
(b) be designed so that part of the trap can be removed for cleaning purposes.
(4) A bell trap or an S-trap shall not be installed in a drainage system.
(5) A drum trap shall not be installed in a drainage system.
(6) Except as permitted in Sentence (7), no bottle trap shall be used in a plumbing system.
(7) A bottle trap may be used on a laboratory sink or other fixture equipped with corrosion resistant fittings.
(8) No running trap shall be installed in a plumbing system unless an accessible handhole is provided for cleaning of the trap, and where the trap is too small to accommodate a handhole, a cleanout shall be provided.

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7.2.3.2. Interceptors
(1) Every interceptor shall be designed so that it can be readily cleaned.
(2) Every grease interceptor shall be designed so that it does not become air bound.

7.2.3.3. Tubular Traps
(1) Tubular metal or plastic traps that conform to CAN/CSA-B125, “Plumbing Fittings” shall be used in accessible locations.

7.2.4. Pipe Fittings
7.2.4.1. T and Cross Fittings
(1) A T fitting shall not be used in a drainage system except to connect a vent pipe.
(2) A cross fitting shall not be used in a drainage system.

7.2.4.2. Sanitary T Fittings
(1) A double sanitary T fitting shall not be used to connect the fixture drains of two urinals where no cleanout fitting is provided above the connection.
(2) No pipe fitting, joint or connection that would tend to intercept solids or reduce the flow through a pipe by more than 10 per cent shall be used in a plumbing system.

7.2.4.3. 90° Elbows
(1) Except as permitted in Sentences (2) and (3), 90° elbows of 4 in. size or less that have a centre-line radius that is less than the size of the pipe shall not be used to join two soil or waste pipes.
(2) 90° elbows of 4 in. size or less in sanitary drainage systems may be used,
(a) to change the direction of piping from horizontal to vertical, in the direction of flow,
(b) where a trap arm enters a wall, or
(c) to connect trap arms as permitted by Sentence 7.5.6.3.(2).
(3) A 90° elbow that is part of the pre-engineered wastewater heat recovery system is permitted to have a centre-line radius that is less than the size of the pipe.

7.2.4.4. Fittings Restricted in Use
(1) No double Y, double TY, double T or double waste fitting shall be installed in a nominally horizontal soil or waste pipe.

7.2.4.5. Assembled Pipe or Tubing
(1) Pipe or tubing assembled to comprise a standard drain waste and venting system shall be connected with drain, waste and vent fittings in conformance with Table 7.2.4.5.

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7.2.5. Non-Metallic Pipe and Fittings
7.2.5.1. Asbestos-Cement Drainage Pipe and Fittings
(1) Except as provided in Sentence (2), asbestos-cement pipe and its fittings for use in a drain, waste or vent system shall conform to,
a. CAN/CGSB-34.22, “Asbestos-Cement Drain Pipe”, or
b.  CSA B127.1, “Asbestos Cement Drain, Waste and Vent Fittings”.
(2) Asbestos-cement pipe and fittings used underground either outside a building or under a building shall conform to Sentence (1) or to,
a.  CAN/CGSB-34.9, “Asbestos-Cement Sewer Pipe”,
b.  CAN/CGSB-34.23, “Asbestos-Cement House Connection Sewer Pipe”, or
c.  CSA B127.2, “Components for Use in Asbestos-Cement Building Sewer Systems”.

7.2.5.2. Reserved

7.2.5.3. Concrete Pipe and Fittings
(1) Concrete pipe shall conform to CSA A257 Series, “Standards for Circular Concrete Pipe and Manholes”.
(2) Joints with external elastomeric gaskets shall be made with corrosion resistant external band type flexible mechanical couplings that conform to CAN/CSA-B602, “Mechanical Couplings for Drain, Waste, and Vent Pipe and Sewer Pipe”.
(3) Concrete fittings field fabricated from lengths of pipe shall not be used.
(4) Concrete pipe shall not be used above ground inside a building.
(5) Precast reinforced circular concrete manhole sections, catch basins and fittings shall conform to CSA A257.4, “Precast Reinforced Circular Concrete Manhole Sections, Catch Basins, and Fittings”.

7.2.5.4. Vitrified Clay Pipe and Fittings
(1) Vitrified clay pipe and fittings shall be certified to CSA A60.1-M, “Vitrified Clay Pipe”.
(2) Couplings and joints for vitrified clay pipe shall be certified to CSA A60.3-M, “Vitrified Clay Pipe Joints”.
(3) Vitrified clay pipe and fittings shall not be used except for an underground part of a drainage system.

7.2.5.5. Polyethylene Pipe and Fittings
(1) Polyethylene water pipe, tubing and fittings shall be certified to Series 160 of CAN/CSAB137.1, “Polyethylene Pipe, Tubing and Fittings for Cold Water Pressure Services”.
(2) Except as permitted in Sentence 7.2.5.7.(1), polyethylene water pipe shall not be used except for a water service pipe.
(3) Butt fusion fittings for polyethylene pipe shall conform to ASTM D3261, “Butt Heat Fusion Polyethylene (PE) Plastic Fittings for Polyethylene (PE) Plastic Pipe and Tubing”.

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7.2.5.6. Polyethylene Pipe Used Underground
(1) Polyethylene pipe used underground in a drainage system for rehabilitation of existing systems using trenchless technology shall conform to ASTM F714, “Polyethylene (PE) Plastic Pipe (SDR-PR) Based on Outside Diameter” and shall be HDPE 3408, SDR 17 or heavier.

7.2.5.7. Crosslinked Polyethylene Pipe and Fittings
(1) Cross-linked polyethylene pipe and its associated fittings used in hot and cold potable water systems shall be certified to CAN/CSA-B137.5, “Cross-linked Polyethylene (PEX) Tubing Systems for Pressure Applications”.

7.2.5.8. PVC Pipe and Fittings
(1) PVC water pipe, fittings and solvent cement shall be certified to CAN/CSA-B137.3, “Rigid Polyvinyl Chloride (PVC) Pipe for Pressure Applications” or CAN/CSA-B137.2, “PVC Injection-Moulded Gasketed Fittings for Pressure Applications”, and have a minimum pressure rating of 1 100 kPa.
(2) PVC water pipe and fittings in Sentence (1) shall not be used in a hot water system.

7.2.5.9. CPVC Pipe, Fittings and Solvent Cements
(1) CPVC hot and cold water pipe, fittings and solvent cements shall be certified to CSA B137.6, “CPVC Pipe, Tubing and Fittings for Hot and Cold Water Distribution Systems”.

(2) The design temperature and design pressure of a CPVC piping system shall conform to CSA B137.6, “CPVC Pipe, Tubing and Fittings for Hot and Cold Water Distribution Systems”.

7.2.5.10. Plastic Pipe, Fittings and Solvent Cement Used Underground
(1) Plastic pipe, fittings and solvent cement used underground outside a building or under a building in a drainage system shall be certified to,
a) ASTM F628, “Acrylonitrile-Butadiene-Styrene (ABS) Schedule 40 Plastic Drain, Waste and Vent Pipe With a Cellular Core”.
b) CAN/CSA-B181.1, “ABS Drain, Waste, and Vent Pipe and Pipe Fittings”,
c) CAN/CSA-B181.2, “PVC Drain, Waste, and Vent Pipe and Pipe Fittings”,
d) CAN/CSA-B182.1, “Plastic Drain and Sewer Pipe and Pipe Fittings”,
e) CAN/CSA-B182.2, “PVC Sewer Pipe and Fittings, (PSM Type)”,
f) CAN/CSA-B182.4, “Profile (Ribbed) PVC Sewer Pipe and Fittings”,
g) CAN/CSA-B182.6, “Profile Polyethylene Sewer Pipe and Fittings”,
h) CAN/CSA B182.7, “Multilayer PVC Sewer Pipe (PSM Type) Having Reprocessed-Recycled Content”,
i) CAN/CSA-B137.2, “PVC Injection-Moulded Gasketed Fittings for Pressure Applications”, or
j) CAN/CSA-B137.3, “Rigid Polyvinyl Chloride (PVC) Pipe for Pressure Applications”,

(2) Except as permitted in Clauses (i) and (j), plastic pipe used as described in Sentence (1) shall have a stiffness equal or greater than 320 kPa.

7.2.5.11. Transition Solvent Cement
(1) Solvent cement for transition joints shall conform to,
a) CAN/CSA-B181.1, “ABS Drain, Waste and Vent Pipe and Pipe Fittings”, or
b) CAN/CSA-B181.2, “PVC Drain, Waste and Vent Pipe and Pipe Fittings”.

(2) Transition solvent cement shall only be used for joining an ABS plumbing system to a PVC plumbing system.

7.2.5.12. Plastic Pipe, Fittings and Solvent Cement Used in Buildings
(1) Plastic pipe, fittings and solvent cement used inside or under a building in a sanitary drainage system or venting system shall be certified to,
a) ASTM F628, “Acrylonitrile-Butadiene-Styrene (ABS) Schedule 40 Plastic Drain, Waste, and Vent Pipe With a Cellular Core”.
b) CAN/CSA-B181.1, “ABS Drain, Waste, and Vent Pipe and Pipe Fittings”, or
c) CAN/CSA-B181.2, “PVC Drain, Waste, and Vent Pipe and Pipe Fittings”.

(2) Plastic pipe, fittings and solvent cement used inside a building in a storm drainage system shall be certified to,
a) ASTM F628, “Acrylonitrile-Butadiene-Styrene (ABS) Schedule 40 Plastic Drain, Waste, and Vent Pipe With a Cellular Core”.
b) CAN/CSA-B181.1, “ABS Drain, Waste, and Vent Pipe and Pipe Fittings”,
c) CAN/CSA-B181.2, “PVC Drain, Waste, and Vent Pipe and Pipe Fittings”,
d) CAN/CSA-B182.1, “Plastic Drain and Sewer Pipe and Pipe Fittings”, or
e) CAN/CSA-B182.2, “PVC Sewer Pipe and Fittings, (PSM Type)”.

(3) Plastic pipe used as described in Sentence (2) shall have a pipe stiffness equal or greater than 320 kPa.

(4) Requirements for combustible piping in relation to fire safety shall conform to Sentences 3.1.5.16.(1) and 9.10.9.6.(2) to （ 8） and Articles 3.1.9.4. and 9.10.9.7.

(5) Where noncombustible piping pierces a fire separation or a fire stop, the requirements for fire stopping of Subsection 3.1.9., Sentence 9.10.9.6.(1) and Article 9.10.16.4. shall apply.

7.2.5.13. Polyethylene/Aluminum/Polyethylene Composite Pipe and Fittings
(1) PE/AL/PE composite pipe and fittings used for potable water systems shall conform to CAN/CSA-B137.9, “Polyethylene/Aluminum/ Polyethylene Composite Pressure Pipe Systems”.

(2) PE/AL/PE pipe and fittings shall not be used in a hot water system.

7.2.5.14. Crosslinked Polyethylene/ Aluminum/ Polyethylene Composite Pipe and Fittings
(1) PEX/AL/PEX composite pipe and fittings used for potable water systems shall conform to CAN/CSA-B137.10, “Crosslinked Polyethylene/Aluminum/Crosslinked Polyethylene Composite Pressure Pipe Systems”.

7.2.5.15. Polypropylene Pipe and Fittings
(1) Polypropylene pipe and fittings used for hot and cold potable water systems shall conform to CAN/CSA-B137.11, “Polypropylene (PP-R) Pipe and Fittings for Pressure Applications”.

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7.2.6. Ferrous Pipe and Fittings
7.2.6.1. Cast Iron Drainage and Vent Pipe and Fittings
(1) Drainage piping, vent piping and fittings made of cast iron shall be certified to CAN/CSAB70, “Cast Iron Soil Pipe, Fittings and Means of Joining”.
(2) Cast iron soil pipe and fittings shall not be used in a water system.

7.2.6.2. Cast Iron Fittings for Asbestos-Cement Drainage Pipe
(1) Cast iron fittings designed for use with asbestos-cement pipe for drainage purposes shall conform to the applicable requirements of,
a) CSA B127.1, “Asbestos Cement Drain, Waste and Vent Fittings”, or
b) CSA B127.2-M, “Components for Use in Asbestos Cement Building Sewer Systems”.

7.2.6.3. Threaded Cast Iron Drainage Fittings
(1) Threaded cast iron drainage fittings shall conform to ANSI/ASME B16.12, “Cast-Iron Threaded Drainage Fittings”.
(2) Threaded cast iron drainage fittings shall not be used in a water system.

7.2.6.4. Cast Iron Water Pipe
(1) Cast iron water pipes shall conform to ANSI/AWWA C151/A21.51, “Ductile-Iron Pipe, Centrifugally Cast for Water”.
(2) Cement mortar lining for cast iron water pipes shall conform to ANSI/AWWA C104/A21.4, “Cement-Mortar Lining for Ductile-Iron Pipe and Fittings for Water”.
(3) Iron fittings for cast iron or ductile-iron water pipes shall conform to ANSI/AWWA C110/A21.10, “Ductile-Iron and Gray-Iron Fittings, 3-in. Through 48-in., (75 mm Through 1200 mm) for Water and Other Liquids”.
(4) Rubber gasket joints for cast iron and ductileiron pressure pipe for water piping shall conform to ANSI/AWWA C111/A21.11, “Rubber-Gasket Joints for Ductile-Iron Pressure Pipe and Fittings”.

7.2.6.5. Screwed Cast Iron Water Fittings
(1) Screwed cast iron water fittings shall conform to ANSI/ASME B16.4, “Gray Iron Threaded Fittings”.
(2) Screwed cast iron water fittings used in a water system shall be cement-mortar lined or galvanized.
(3) Screwed cast iron water fittings shall not be used in a drainage system.

7.2.6.6. Screwed Malleable Iron Water Fittings
(1) Screwed malleable iron water fittings shall conform to ANSI/ASME B16.3, “Malleable Iron Threaded Fittings”.
(2) Screwed malleable iron water fittings used in a water system shall be cement-mortar lined or galvanized.
(3) Screwed malleable iron water fittings shall not be used in a drainage system.

7.2.6.7. Steel Pipe
(1) Except as provided in Sentences (2) and (3), welded and seamless steel pipe shall not be used in a plumbing system.
(2) Galvanized steel pipe may be used in a drainage system or a venting system above ground inside a building.
(3) Galvanized steel pipe and fittings shall not be used in a water distribution system except,
a) in buildings of industrial occupancy, or
b) for the repair of existing galvanized steel piping systems.
(4) Galvanized steel pipe and fittings shall conform to ASTM A53/A53M, “Pipe, Steel, Black and Hot Dipped, Zinc-Coated Welded and Seamless”.
(5) Where galvanized steel pipe is used in a drainage system, it shall be used with drainage fittings.
（6） All steel pipe of 4 in. size and smaller shall be schedule 40 or heavier and fittings of less than 2 in. size shall be galvanized screw fittings.

7.2.6.8. Corrugated Steel Pipe and Couplings
(1) Corrugated steel pipe and couplings shall be certified to CSA G401, “Corrugated Steel Pipe Products”.
(2) Corrugated steel pipe shall only be used underground outside a building in a storm drainage system.
(3) Couplings for corrugated steel pipe shall be constructed so that when installed they shall,
a) maintain the pipe alignment,
b) resist the separation of adjoining lengths of pipe,
c) prevent root penetration, and
d) prevent the infiltration of surrounding material.

7.2.6.9. Sheet Metal Leaders
(1) A sheet metal leader shall not be used except above ground outside a building.

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7.2.7. Non-Ferrous Pipe and Fittings

7.2.7.1. Copper and Brass Pipe
(1) Copper pipe shall conform to ASTM B42, “Seamless Copper Pipe, Standard Sizes”.
(2) Brass pipe shall conform to ASTM B43, “Seamless Red Brass Pipe, Standard Sizes”.

7.2.7.2. Brass or Bronze Pipe Flanges and Flanged Fittings
(1) Brass or bronze pipe flanges and flanged fittings shall conform to ANSI/ASME B16.24, “Cast Copper Alloy Pipe Flanges and Flanged Fittings”.

7.2.7.3. Brass or Bronze Threaded Water Fittings
(1) Brass or bronze threaded water fittings shall conform to ANSI/ASME B16.15, “Cast Bronze Threaded Fittings, Classes 125 and 250”.
(2) Brass or bronze threaded water fittings shall not be used in a drainage system.

7.2.7.4. Copper Tube
(1) Copper tube in a plumbing system shall,
a) be certified to ASTM B88, “Seamless Copper Water Tube”, or
b) comply with ASTM B306, “Copper Drainage Tube (DWV)”.
(2) The use of copper tube shall conform to Table 7.2.7.4.
(3) Copper tube used in a plumbing appliance shall conform to,
a) ASTM B88, “Seamless Copper Water Tube”, or
b) ASTM B68, “Seamless Copper Tube”.
(4) Type K or L copper tube shall be used for the potable water side of a heat exchanger in a pre-engineered wastewater heat recovery system.

7.2.7.5. Solder-Joint Drainage Fittings
(1) Solder-joint fittings for drainage systems shall conform to,
a) ASME B16.23, “Cast Copper Alloy Solder Joint Drainage Fittings: DWV”, or
b) ANSI/ASME B16.29, “Wrought Copper and Wrought Copper Alloy Solder Joint Drainage Fittings – DWV”.
(2) Solder-joint fittings for drainage systems shall not be used in a water system.

7.2.7.6. Solder-Joint Water Fittings
(1) Except as provided in Sentence (2), solder-joint fittings for water systems shall conform to,
a) ANSI B16.18, “Cast Copper Alloy Solder Joint Pressure Fittings”, or
b) ANSI/ASME B16.22, “Wrought Copper and Copper Alloy Solder Joint Pressure Fittings”.
(2) Solder-joint fittings for water systems not made by casting or the wrought process shall conform to the applicable requirements of ANSI B16.18, “Cast Copper Alloy Solder Joint Pressure Fittings”.

7.2.7.7. Flared-Joint Fittings for Copper Water Systems
(1) Flared-joint fittings for copper tube water systems shall conform to ANSI/ASME B16.26, “Cast Copper Alloy Fittings for Flared Copper Tubes”.
(2) Flared-joint fittings for copper tube water systems not made by casting shall conform to the applicable requirements of ANSI/ASME B16.26, “Cast Copper Alloy Fittings for Flared Copper Tubes”.

7.2.7.8. Lead Waste Pipe and Fittings
(1) Lead waste pipe and fittings shall not be used in a water system or for a building sewer.
(2) When there is a change in size of a lead closet bend, the change shall be in the vertical section of the bend or made in such a manner that there shall be no retention of liquid in the bend.