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International Plumbing Code

The 2006 International Plumbing Code (IPC

) continues to emphasize both prescriptive andperformance-related provisions. The code change cycles have made many improvements to the 2006IPC that provide clarity of content and resolve common interpretation issues.

ScopeThe scope of the 2006 IPC continues toencompass the initial design of the plumbingsystem, the installation and construction ofplumbing systems and the maintenance ofoperating systems. All plumbing systems that areprovided for utilization by and for the generalsafety and well-being of the occupants of abuilding are intended to be governed by the code.

Standard UseAs both a prescriptive and performance-basedcode, the IPC contains numerous references tostandards that are used to regulate materials andmethods of construction. A standard that isincorporated into the code through the codedevelopment process is an enforceable part of thecode. Standards are referenced throughout thecode and are listed in Chapter 14.

^

Content& Chapter 2: Definitions

& Chapter 3: General Regulations

& Chapter 4: Fixtures, Faucets andFixture Fittings

& Chapter 6: Water Supply andDistribution

& Chapter 7: Sanitary Drainage

& Chapter 9: Vents

& Chapter 10: Traps, Interceptorsand Separators

& Chapter 11: Storm Drainage

& Appendix C: Gray WaterRecycling Systems

2006 International Plumbing Code


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Chapter 2: Definitions

Code Section

Section Title Change

2006 2003

202 202 Definitions

Branch Interval is further defined by referring to the distance betweenconnections of horizontal branches to a drainage stack. Measurements are

taken down the stack from the highest horizontal branch connection. [SeeFigures 202(1) and 202(2)].

202 202 Definitions

New definitions for Flow Control (vented) and Grease Removal Device,Automatic are added. These new definitions correlate with the revisedrequirements for grease removal devices and rate of flow controls found inChapter 10. The definition for grease trap was deleted because all greasetraps are now called grease interceptors. [See Figure 202(3)].

2

THIS IS A BRANCHINTERVAL

THIS ISNOT ABRANCHINTERVAL

FLOOR

FLOORSOIL OR WASTE STACK

10-0

STORYHEIGHT(TYP

.)

7-0

8-0

OR

MORE

Definition of Branch IntervalFigure 202(1)


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3

BUILDING DRAIN

TOBUILDINGSEWER

1 STORYst

FLOOR

2 STORYnd

3 STORYrd

4 STORYth

5 STORYth

6 STORYth

7 STORYth

8 STORYth

9 STORYth

10 STORYth

11 STORYth

10 ALL FLOORSBI 1

BI 2

BI 3

BI 4

BI 5

BI 6

BI 7

VTR

Definition of Branch IntervalFigure 202(2)


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Chapter 3: General Regulations

Code Section


2006 2003

310.5 NEW Urinal partitionsProvisions added to require partitions between urinals. Exceptions exemptsingle occupant or unisex toilet rooms with a lockable door and exempt asingle urinal in a daycare or child care facilities with two or more urinals.[See Figures 310.5(1) and (2)].

314.2.3 #4 314.2.3 Condensate disposalA fourth option has been added for a primary condensate pan water leveldetection device. [See Figures 307.2.3(1) through (3)].

4

Definition of Grease Removal Device, Automatic(Photo courtesy of Josam Company)

Figure 202(3)


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5

Condensate Overflow Switch(Photo courtesy of SMD Research, Inc)

Figure 307.2.3(1)

Condensate Overflow Switch(Photo courtesy of SMD Research, Inc)

Figure 307.2.3(2)

Primary or Auxiliary Drain Pan Float Switch(Photo courtesy of SMD Research, Inc)

Figure 307.2.3(3)


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6

Urinal Partitions(Photo courtesy of Falcon Waterfree Technologies)

Figure 310.5(1)

12 MAXIMUM

60MINIMUM

L

18 MINIMUM OR 6 BEYOND LIP, WHICHEVER IS GREATER

18

6

PARTITION

WALL

ELEVATION V IEW

Urinal PartitionsFigure 310.5(2)


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^

Chapter 4: Fixtures, Faucets and Fixture Fittings

Code Section


2006 2003

403.1 403.1

Outdoor seating area

occupant load

A new footnote is added to Table 403.1 and requires outdoor seating area

occupant loads to be added to indoor occupant loads for A-1, A-2 and A-3occupancies for the purpose of determining the required number of fixtures.

403.4 403.6Required public toiletfacilities

Public toilet facilities cannot be accessed through kitchens and storagespaces. (See Figure 403.6).

406.3 406.3Clothes washer wasteconnection

The required text recognizes that gravity draining clothes washing machinesneed to discharge to a waste receptor such as a trench drain. (See Figure406.3).

408.3 NEW Bidet water temperature

An ICC appointed Ad Hoc Committee on Water Temperature and Controlevaluated the types of hazards and applications where scalding and thermalshock can occur, identifying plumbing fixtures and equipment that requiretemperature control limits and the appropriate standards for control devices.The code requires a maximum discharge water temperature from bidetfittings of 110NF to be provided by a water temperature limiting device

conforming to ASSE 1070. [See Figures 408.3(1) and (2)].

416.5 NEWTempered water for publichand-washing facilities

The code requires that tempered water be delivered from public hand-washing facilities. Tempered water must be provided by an approved watertemperature limiting device that conforms to ASSE 1070. [See Figures416.5(1) and (2)].

419.1 419.1 UrinalsWaterless urinals are distinguished from water-supplied urinals. [SeeFigures 419.1(1) and (2)].

419.2 419.2Substitution for waterclosets

Substitution allowance is reduced to 50% maximum for occupancies otherthan A and E (remains 67% for A and E).

421.5 NEW Access to pumpA new section is added to address the access requirements for whirlpooltub circulation pumps. [See Figures 421.5(1) and (2)].

424.4 NEW Multiple (gang) showers

Water temperature limiting devices for gang showers supplied with a single-tempered water supply pipe must comply with ASSE 1069 or CSA B125.The option of using an individually controlled balanced-pressure,thermostatic or combination balanced-pressure/thermostatic valve for eachshower head requires that such controls conform to ASSE 1016 or CSAB125. [See Figures 424.4(1) and (2)].

424.5 NEWBathtub and whirlpoolbathtub valves

Bathtubs and whirlpool bathtubs must be provided with a water temperaturelimiting device that conforms to ASSE 1070, except where such protectionis otherwise provided by a combination tub/shower valve that conforms toASSE 1016 or CSA B125. The maximum setting of such devices is limitedto 120

N

F. [See Figures 424.5(1) and (2)].

7


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8

KITCHEN

CUSTOMER AREA

M

FKITCHEN

CUSTOMER AREA

M

F

SALES COUNTER SALES COUNTER

EMPLOYEE EMPLOYEE

NOT OK OK

Customer Toilet AccessFigure 403.6

Clothes Washer Trench DrainFigure 406.3


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9

Waterless Urinal(Photo courtesy of Falcon Waterfree Technologies)

Figure 419.1(1)

Waterless Urinal Cartridge(Photo courtesy of Falcon Waterfree Technologies)

Figure 419.1(2)


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Plumbing FixtureMaximum Discharge

TemperatureReference Standard

1. Bidet 110F ASSE 1070

2. Public hand-washing facilities > 85F and < 110F ASSE 1070

3. Individual shower valves 120F ASSE 1016 or CSA B125

4. Multiple (gang) showers 120F ASSE 1069 or CSA B125

5. Bathtub/whirlpool bathtubs 120F

ASSE 1070, Optional Combination

tub/shower valve conforming toASSE 1016 or CSA B125

10

Figures 408.3, 416.5, 424.4, 424.5 (1)

Figures 408.3, 416.5, 424.4, 424.5(2)


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11

Noncompliant Whirlpool Bathtub Pump AccessFigure 421.5(1)

Noncompliant Whirlpool Bathtub Pump AccessFigure 421.5(2)


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^

Chapter 6: Water Supply and Distribution

Code Section


2006 2003

607.1 607.1 Where required

Where tempered water is supplied in nonresidential occupancies for bathingand washing purposes, it must be tempered by a device conforming toASSE 1070. The tempered water is limited to a maximum temperature of

110F.

608.16.10 NEWCoffee machines andnoncarbonated beveragedispensers

New requirements address backflow protection for the water supplyconnection to coffee machines and noncarbonated beverage dispensers.The connections must be protected against backflow by a deviceconforming to ASSE 1022 or by an air gap.

Chapter 7: Sanitary Drainage

Code Section


2006 2003

706.4 NEWHeel- or side-inlet quarterbends

Heel inlet elbows, both high- and low-inlet types, are specifically addressedregarding allowed and disallowed applications. [See Figures 706.4(1) and(2)].

Table 709.1 Table 709.1DFUs for Fixtures andGroups

A DFU value of 0.5 is assigned to nonwater supplied urinals. [See Figures419.1(1) and (2)].

12


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________________________________________________________________________________

13

BEND WITHSIDE INLET

BEND WITHHIGH-HEEL INLET

BEND WITHLOW-HEEL INLET

NO LIMITATIONSBY SECTION 706.4

NOT ALLOWED FORWATER CLOSET DRAINS

NOT ALLOWED FORWATER CLOSET DRAINS

AND NOT ALLOWED FORCONNECTION OF A WET-VENTED FIXTURE DRAIN

Heel- and Side-Inlet Quarter BendsFigure 706.4(1)

Side-Inlet Quarter BendFigure 706.4(2)


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Chapter 9: Vents

Code Section


2006 2003

903.1 903.1 Outdoor vent extension

The traditional main vent rule has been rewritten to restate and clarify theintent. The undiminished in size and directly as possible text has beendeleted. (See Figure 903.1).

903.1.1 903.1.1 Installation

903.1.2 NEW Size

Table 906.1 Table 906.1Maximum Distance of Trapfrom Vent

The new replacement table reflects the principle stated in revised Section906.2. [See Figure 906.1(2)].

906.1 906.1 Distance of trap from ventWater closets are now exempt from the trap to vent distance rule. [SeeFigure 906.1(1)].

906.2 906.2 Venting of fixture drainsNew language states that the total fall in a fixture drain resulting from pipeslope must not exceed the inside diameter of the fixture drain. (See Figure906.2).

910.2 910.2 Stack installationThe text has been clarified regarding offsets in the stack both above thehighest fixture drain connection and below the lowest fixture drainconnection. (See Figure 910.2).

910.3 910.3 Stack ventThe revised text makes it apparent that the stack vent for waste-stack ventsystems can connect to vent headers with other vents. (See Figure 910.3).

912.2 912.2 InstallationAs revised, this section now allows a vertical pipe component for all fixturesthat are permitted to connect to a combination drain and vent system,including floor drains. (See Figure 912.2).

14

CO

BUILDING

DRAIN

VTR

VTR

VTR

OR

OR

Required Vent to OutdoorsFigure 903.1


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Table 906.1(2)MAXIMUM DISTANCE OF FIXTURE TRAP FROM VENT

Size of Trap (inches) Slope (inch per foot) Distance from Trap (feet)

1 1/4 1/4 5

1 1/2 1/4 6

2 1/4 8

3 1/8 12

4 1/8 16

15

WC

SHWR

LAV

WC

WC

UNLIMITED

UNLIM

ITED

UNLIM

ITED

Trap to Vent Distance for Water ClosetsFigure 906.1(1)

Figure 906.1(2)

DRY VENT

1 FIXTUREDRAIN

6 FT1

5 FT1

4 FT1

3 FT

2 FT

1 FT

TOTAL FALL DOES NOT EXCEED DIAMETER OF FIXTURE DRAIN

Maximum Fall of Fixture Drain Between Trap and VentFigure 906.2


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16

TO BUILD

INGDRA

IN

VTR

FD

8 MAXIMUM

8 MAXIMUM

8 MAXIMUMFD

SINK

FD

DF

FD

Vertical Fixture Drain Component in Combination Drain and Vent SystemFigure 912.2

VTR

NOT LESSTHAN SIZEOF WASTE

STACK

STACK VENTS FOR WASTESTACK VENTS ARE PERMITTED

TO CONNECT TO A COMMONVENT HEADER

OFFSETSALLOWED

OFFSETSALLOWED

OFFSETSPROHIBITEDIN THIS PART

OF THE STACK

Waste Stack Vent Offsets and Stack Vent ConnectionsFigures 910.2 and 910.3


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Chapter 10: Traps, Interceptors and Separators

Code Section


2006 2003

1003.3.1 1003.3.1Grease interceptors andautomatic grease removaldevices required

Additional language is added to include automatic grease removal devicesand list the type of fixtures and equipment with grease-laden waste that

must discharge to such interceptors.

1003.3.5 NEW

Automatic grease removal

devices

New language addresses automatic grease removal devices and their

installation and sizing requirements. (See Figure 1003.3.5).

1003.4 1003.4 Oi l separators requiredAs revised, this section will require oil separators for all car washingfacilities.

1003.6 1003.6 LaundriesNew text provides clarification regarding laundry facilities not installed withinan individual dwelling unit or intended for individual family use.

^

17

Automatic Grease Removal DevicesFigure 1003.3.5


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Appendix C: Gray Water Recycling Systems

Code Section


2006 2003

Appendix C Appendix CGray Water RecyclingSystems

New text provides greater detail and specifications of gray water systemsfor flushing of water closets and urinals and subsurface landscape irrigation.(See Figures C1 and C2).

18

Gray Water Recycling System for Fixture FlushingFigure C1


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19

Gray Water Recycling System for Subsurface IrrigationFigure C2


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^

1. Answers will vary. For example, acceptable answers would include:

w There are new definitions for flow control (vented) and grease removal device, automatic

(Section 202).w Provisions were added to address urinal partitions (Section 310.5).

w There are new requirements that address backflow protection for the water supply connection tocoffee machines and noncarbonated beverage dispensers (Section 608.16.10).

2. Answer will vary. For example, an acceptable answer would be:

w In Section 202, new definitions correlate with the revised requirements for grease removaldevices and the rate of flow controls located in Chapter 10.

3. c. 18 from the wall or 6 beyond the urinal lip; whichever is greater.

4.

1. Bidet 110F ASSE 1070

2. Public hand-washingfacilities

> 85F and < 110F ASSE 1070

3. Individual shower valves 120F ASSE 1016 or CSA B125

4. Multiple (gang) showers 120F ASSE 1069 or CSA B125

5. Bathtub/whirlpool bathtubs 120

F ASSE 1070, OptionalCombination tub/shower valveconforming to ASSE 1016 or

CSA B125

5. 50 percent

6. The floor joist cut violates the structural provisions of the IRC and IBC.

7. ASSE 1022

8. Yes. An interceptor with a wire basket or similar device.

2006 I-Code Update: International Plumbing Code published by International Code Council, Inc. Professional

Development Services 4051 West Flossmoor Road Country Club Hills, IL 60478-5795 U.S.A. Phone

1-888-ICC-SAFE (422-7233) Fax (708) 799-2651 http://www.iccsafe.org/training Copyright January 2006

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