CODES

ADOPTS WITH AMENDMENTS:

International Residential Code 2009 (IRC 2009)

Copyright

Preface

Effective Use of the International Residential Code

Ordinance

Chapter 1 Scope and Administration

Chapter 2 Definitions

Chapter 3 Building Planning

Chapter 4 Foundations

Chapter 5 Floors

Chapter 6 Wall Construction

Chapter 7 Wall Covering

Chapter 8 Roof-Ceiling Construction

Chapter 9 Roof Assemblies

Chapter 10 Chimneys and Fireplaces

Chapter 11 Energy Efficiency

Chapter 12 Mechanical Administration

Chapter 12 Mechanical Administration

Chapter 13 General Mechanical System Requirements

Chapter 13 General Mechanical System Requirements

Chapter 14 Heating and Cooling Equipment

Chapter 14 Heating and Cooling Equipment

Chapter 15 Exhaust Systems

Chapter 15 Exhaust Systems

Chapter 16 Duct Systems

Chapter 16 Duct Systems

Chapter 17 Combustion Air

Chapter 17 Combustion Air

Chapter 18 Chimneys and Vents

Chapter 18 Chimneys and Vents

Chapter 19 Special Fuel-Burning Equipment

Chapter 19 Special Fuel-Burning Equipment

Chapter 20 Boilers and Water Heaters

Chapter 20 Boilers and Water Heaters

Chapter 21 Hydronic Piping

Chapter 21 Hydronic Piping

Chapter 22 Special Piping and Storage Systems

Chapter 22 Special Piping and Storage Systems

Chapter 23 Solar Systems

Chapter 23 Solar Systems

Chapter 24 Fuel Gas

Chapter 24 Fuel Gas

Chapter 25 Plumbing Administration

Chapter 25 Plumbing Administration

Chapter 26 General Plumbing Requirements

Chapter 26 General Plumbing Requirements

Chapter 27 Plumbing Fixtures

Chapter 27 Plumbing Fixtures

Chapter 28 Water Heaters

Chapter 28 Water Heaters

Chapter 29 Water Supply and Distribution

Chapter 29 Water Supply and Distribution

Chapter 30 Sanitary Drainage

Chapter 30 Sanitary Drainage

Chapter 31 Vents

Chapter 31 Vents

Chapter 32 Traps

Chapter 32 Traps

Chapter 33 Storm Drainage

Chapter 33 Storm Drainage

Chapter 34 General Requirements

Chapter 34 General Requirements

Chapter 35 Electrical Definitions

Chapter 35 Electrical Definitions

Chapter 36 Services

Chapter 36 Services

Chapter 37 Branch Circuit and Feeder Requirements

Chapter 37 Branch Circuit and Feeder Requirements

Chapter 38 Wiring Methods

Chapter 38 Wiring Methods

Chapter 39 Power and Lighting Distribution

Chapter 39 Power and Lighting Distribution

Chapter 40 Devices and Luminaires

Chapter 40 Devices and Luminaires

Chapter 41 Appliance Installation

Chapter 41 Appliance Installation

Chapter 42 Swimming Pools

Chapter 42 Swimming Pools

Chapter 43 Class 2 Remote-Control, Signaling and Power-Limited Circuits

Chapter 43 Class 2 Remote-Control, Signaling and Power-Limited Circuits

Chapter 44 Referenced Standards

Chapter 45 HIGH WIND ZONES

Chapter 46 COASTAL AND FLOOD PLAIN CONSTRUCTION STANDARDS

Appendix A Sizing and Capacities of Gas Piping

Appendix B Sizing of Venting Systems Serving Appliances Equipped With Draft Hoods, Category I Appliances, and Appliances Listed for Use With Type B Vents

Appendix C Exit Terminals of Mechanical Draft and Direct-Vent Venting Systems

Appendix D Recommended Procedure for Safety Inspection of an Existing Appliance Installation

Appendix E Manufactured Housing Used as Dwellings

Appendix F Radon Control Methods

Appendix G Swimming Pools, Spas and Hot Tubs

Appendix H Patio Covers

Appendix I Private Sewage Disposal

Appendix J Existing Buildings and Structures

Appendix K Sound Transmission

Appendix L Permit Fees

Appendix M Home Day Care - R-3 Occupancy

Appendix M WOOD DECKS

Appendix N Venting Methods

Appendix N BASIC LOAD ESTIMATING

Appendix O Gray Water Recycling Systems

Appendix O FOAM PLASTIC DIAGRAMS

Appendix P Sizing of Water Piping System

Appendix P DWELLING UNIT FIRE SPRINKLER SYSTEMS

Appendix Q ICC International Residential Code Electrical Provisions/National Electrical Code Crossreference

Appendix Q DISCONTINUOUS FOOTING DETAIL FOR GARAGE OR PORCH WALLS FOUNDATION WALL EXTENSION DETAIL

Chapter 21 Hydronic Piping

STATE AMENDMENT

Hydronic piping shall conform to Table M2101.1. Approved piping, valves, fittings and connections shall be installed in accordance with the manufacturer’s installation instructions. Pipe and fittings shall be rated for use at the operating temperature and pressure of the hydronic system. Used pipe, fittings, valves or other materials shall be free of foreign materials.

TABLE M2101.1
HYDRONIC PIPING MATERIALS

MATERIAL

USE CODEa

STANDARDb

JOINTS

NOTES

Brass pipe

1

ASTM B 43

Brazed, welded, threaded, mechanical and flanged fittings

Brass tubing

1

ASTM B 135

Brazed, soldered and mechanical fittings

Chlorinated poly (vinyl chloride) (CPVC) pipe and tubing

1, 2, 3

ASTM D 2846

Solvent cement joints, compression joints and threaded adapters

Copper pipe

1

ASTM B 42,

B 302

Brazed, soldered and mechanical fittings threaded, welded and flanged

Copper tubing
(type K, L or M)

1, 2

ASTM B 75,
B 88, B 251,
B 306

Brazed, soldered and flared mechanical fittings

Joints embedded in concrete

Cross-linked polyethylene (PEX)

1, 2, 3

ASTM F 876,
F 877

(See PEX fittings)

Install in accordance with manufacturer’s instructions.

Cross-linked polyethylene/aluminum/
cross-linked polyethylene-(PEX-AL-PEX)
pressure pipe

1, 2

ASTM F 1281 or
CAN/ CSA B137.10

Mechanical, crimp/insert

Install in accordance with manufacturer’s instructions.

PEX Fittings

ASTM F 1807
ASTM F 1960
ASTM F 2098

Copper-crimp/insert fittings, cold expansion fittings, stainless steel clamp, insert fittings

Install in accordance with manufacturer’s instructions

Plastic fittings PEX

ASTM F 1807

Polybutylene (PB) pipe and tubing

1, 2, 3

ASTM D 3309

Heat-fusion, crimp/insert and compression

Joints in concrete shall be heat-fused.

Polyethylene (PE) pipe, tubing and fittings (for ground source heat pump loop systems)

1, 2, 4

ASTM D 2513;
ASTM D 3350;
ASTM D 2513;
ASTM D 3035;
ASTM D 2447;
ASTM D 2683;
ASTM F 1055;
ASTM D 2837;
ASTM D 3350;
ASTM D 1693

Heat-fusion

Polyethylene/aluminum/polyethylene (PE-AL-PE) pressure pipe

1, 2, 3

ASTM F 1282
CSA B 137.9

Mechanical, crimp/insert

Polyproplylene (PP)

1, 2, 3

ISO 15874
ASTM F 2389

Heat-fusion joints, mechanical fittings, threaded adapters, compression joints

Raised temperature polyethylene (PE-RT)

1, 2, 3

ASTM F 2623

Copper crimp/insert fitting stainless steel clamp, insert fittings

Soldering fluxes

1

ASTM B 813

Copper tube joints

Steel pipe

1, 2

ASTM A 53,
A 106

Brazed, welded, threaded, flanged and mechanical fittings

Joints in concrete shall be welded. Galvanized pipe shall not be welded or brazed.

Steel tubing

1

ASTM A 254

Mechanical fittings, welded

For SI: °C = [(°F)-32]/1.8.

a. Use code:

1. Above ground.

2. Embedded in radiant systems.

3. Temperatures below 180°F only.

4. Low temperature (below 130°F) applications only.

b. Standards as listed in Chapter 43.

Hydronic piping systems shall be installed to permit draining of the system. Where the system drains to the plumbing drainage system, the installation shall conform to the requirements of Chapters 25 through 32 of this code.

Exception: The buried portions of systems embedded underground or under floors.

The potable water system shall be protected from backflow in accordance with the provisions listed in Section P2902.
Openings through concrete or masonry building elements shall be sleeved.
A hydronic piping system shall not be in direct contact with any building material that causes the piping material to degrade or corrode.
Wood-framed structural members shall be drilled, notched or altered in accordance with the provisions of Sections R502.8, R602.6, R602.6.1 and R802.7. Holes in load bearing members of cold-formed steel light-frame construction shall be permitted only in accordance with Sections R505.2.5, R603.2.5 and R804.2.5. In accordance with the provisions of Sections R505.3.5, R603.3.4 and R804.3.4, cutting and notching of flanges and lips of load-bearing members of cold-formed steel light-frame construction shall not be permitted. Structural insulated panels (SIPs) shall be drilled and notched or altered in accordance with the provisions of Section R614.
Fluid in the supply side of a hydronic system shall not enter a tee fitting through the branch opening.
Piping shall be installed so that piping, connections and equipment shall not be subjected to excessive strains or stresses. Provisions shall be made to compensate for expansion, contraction, shrinkage and structural settlement.

Hangers and supports shall be of material of sufficient strength to support the piping, and shall be fabricated from materials compatible with the piping material. Piping shall be supported at intervals not exceeding the spacing specified in Table M2101.9.

TABLE M2101.9
HANGER SPACING INTERVALS

PIPING MATERIAL

MAXIMUM HORIZONTAL SPACING
(feet)

MAXIMUM VERTICAL SPACING
(feet)

ABS

4

10

CPVC ≤ 1 inch pipe or tubing

3

5

CPVC ≥ 11/4 inch

4

10

Copper or copper alloy pipe

12

10

Copper or copper alloy tubing

6

10

PB pipe or tubing

2.67

4

PE pipe or tubing

2.67

4

PEX tubing

2.67

4

PP < 1 inch pipe or tubing

2.67

4

PP > 11/4 inch

4

10

PVC

4

10

Steel pipe

12

15

Steel tubing

8

10

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.

Hydronic piping shall be tested hydrostatically at a pressure of not less than 100 pounds per square inch (690 kPa) for a duration of not less than 15 minutes.
Baseboard convectors shall be installed in accordance with the manufacturer’s installation instructions. Convectors shall be supported independently of the hydronic piping.
Piping for embedment in concrete or gypsum materials shall be standard-weight steel pipe, copper tubing, cross-linked polyethylene/aluminum/cross-linked polyethylene (PEX-AL-PEX) pressure pipe, chlorinated polyvinyl chloride (CPVC), polybutylene, cross-linked polyethylene (PEX) tubing or polypropylene (PP) with a minimum rating of 100 psi at 180°F (690 kPa at 82°C).
Radiant floor heating systems shall have a thermal barrier in accordance with Sections M2103.2.1 through M2103.2.4.
Radiant piping used in slab-on-grade applications shall have insulating materials having a minimum R-value of 5 installed beneath the piping.
In suspended floor applications, insulation shall be installed in the joist bay cavity serving the heating space above and shall consist of materials having a minimum R-value of 11.
A thermal break consisting of asphalt expansion joint materials or similar insulating materials shall be provided at a point where a heated slab meets a foundation wall or other conductive slab.

Insulating materials used in thermal barriers shall be installed so that the manufacturer’s R-value mark is readily observable upon inspection.

Exception: Insulation shall not be required in engineered systems where it can be demonstrated that the insulation will decrease the efficiency or have a negative effect on the installation.

Piping joints that are embedded shall be installed in accordance with the following requirements:

1. Steel pipe joints shall be welded.

2. Copper tubing shall be joined with brazing material having a melting point exceeding 1,000°F (538°C).

3. Polybutylene pipe and tubing joints shall be installed with socket-type heat-fused polybutylene fittings.

4. CPVC tubing shall be joined using solvent cement joints.

5. Polypropylene pipe and tubing joints shall be installed with socket-type heat-fused polypropylene fittings.

6. Cross-linked polyethylene (PEX) tubing shall be joined using cold expansion, insert or compression fittings.

Piping or tubing to be embedded shall be tested by applying a hydrostatic pressure of not less than 100 psi (690 kPa). The pressure shall be maintained for 30 minutes, during which all joints shall be visually inspected for leaks.
Low temperature piping for embedment in concrete or gypsum materials shall be as indicated in Table M2101.1.

Piping joints (other than those in Section M2103.2) that are embedded shall comply with the following requirements:

1. Cross-linked polyethylene (PEX) tubing shall be installed in accordance with the manufacturer’s instructions.

2. Polyethylene tubing shall be installed with heat fusion joints.

3. Polypropylene (PP) tubing shall be installed in accordance with the manufacturer's instructions.

Joints between polyethylene plastic pipe and tubing or fittings for ground source heat pump loop systems shall be heat fusion joints conforming to Section M2104.2.1.1, electrofusion joints conforming to Section M2104.2.1.2 or stab-type insertion joints conforming to Section M2104.2.1.3.
Joints shall be of the socket-fusion, saddle-fusion or butt-fusion type, fabricated in accordance with the piping manufacturer’s instructions. Joint surfaces shall be clean and free of moisture. Joint surfaces shall be heated to melt temperatures and joined. The joint shall be undisturbed until cool. Fittings shall be manufactured in accordance with ASTM D 2683.
Joint surfaces shall be clean and free of moisture, and scoured to expose virgin resin. Joint surfaces shall be heated to melt temperatures for the period of time specified by the manufacturer. The joint shall be undisturbed until cool. Fittings shall be manufactured in accordance with ASTM F 1055.
Joint surfaces shall be clean and free of moisture. Pipe ends shall be chamfered and inserted into the fitting to full depth. Fittings shall be manufactured in accordance with ASTM D 2513.
Joints between raised temperature polyethylene tubing and fittings shall conform to Sections M2104.3.1 and M2104.3.2. Mechanical joints shall be installed in accordance with the manufacturer’s instructions.
Where compression type fittings include inserts and ferrules or O-rings, the fittings shall be installed without omitting such inserts and ferrules or O-rings.
Solder joints in a metal pipe shall not occur within 18 inches (457 mm) of a transition from such metal pipe to PE-RT pipe.
Joints between polyethylene/aluminum/polyethylene pressure pipe and fittings shall conform to Sections M2104.4.1 and M2104.4.2. Mechanical joints shall be installed in accordance with the manufacturer’s instructions.
Where compression type fittings include inserts and ferrules or O-rings, the fittings shall be installed without omitting such inserts and ferrules or O-rings.
Solder joints in a metal pipe shall not occur within 18 inches (457 mm) of a transition from such metal pipe to PE-AL-PE pipe.
The assembled loop system shall be pressure tested with water at 100 psi (690 kPa) for 30 minutes with no observed leaks before connection (header) trenches are backfilled. Flow rates and pressure drops shall be compared to calculated values. If actual flow rate or pressure drop figures differ from calculated values by more than 10 percent, the problem shall be identified and corrected.
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