Residential Plumbing Inspector (CAP)

Lesson 2

Utilities

Base on 2014 OPSC

1 Updated: June 2015

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Sewers

305.0 Every building in which plumbing fixtures are

installed shall have a connection to a public or

private sewer.

308.0 Except as otherwise provided in this code, no

plumbing system, drainage system, building sewer,

private sewage disposal system, or parts thereof shall

be located in any lot other than the lot that is the site

of the building, structure, or premises served by such

facilities.

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713.2 When no public sewer intended to serve any lot or

premises is available in any thoroughfare or right of way

abutting such lot or premises, drainage piping from any

building or works shall be connected to an approved

private sewage disposal system.

713.4 The public sewer shall be permitted to be

considered as not being available when such public

sewer or any building or any exterior drainage facility

connected thereto is located more than two-hundred

(200) feet from any proposed building or exterior

drainage facility on any lot or premises that abuts and is

served by such public sewer.

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713.3 Within the limits prescribed by Section 713.4 hereof,

the rearrangement or subdivision into smaller parcels of a lot

that abuts and is served by a public sewer shall not be

deemed cause to permit the construction of a private sewage

disposal system, and plumbing or drainage systems on any

such smaller parcel or parcels shall connect to the public

sewer.

713.4 The public sewer shall be permitted to be considered

as not being available when such public sewer or any

building or any exterior drainage facility connected thereto

is located more than two-hundred (200) feet from any

proposed building or exterior drainage facility on any lot or

premises that abuts and is served by such public sewer.

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Sewers

312.0 The drainage system of each new building and of new work installed in any existing building shall be separate and independent from that of any other building, and, when available, every building shall have an independent connection with a public or private sewer.

Exception: where one building stands in the rear of another building on an interior lot, and no private sewer is available or can be constructed to the rear building through an adjoining court, yard, or driveway, the building drain from the front building shall be permitted to be extended to the rear building.

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TABLE 7-1

Materials for Drain, Waste, Vent Pipe and Fittings

Material Underground Drain, Waste,

Vent Pipe and Fittings

Above ground Drain,

Waste, Vent Pipe and

Fittings

Building Sewer Pipe and

Fittings

Referenced Standard(s)

Pipe Referenced Standard(s) Fittings

ABS (Schedule40) X X X

ASTM D1527, ASTM

D2661, ASTM D26801 ,

ASTM F628

ASTM D2661, ASTM D26801

Asbestos-Cement X

ASTM C4281 , ASTM C141

Brass

X

ASTM B43

Cast-Iron X X X ASTM A74, ASTM A888,

CISPI 301

ASME B16.12, ASTM A74, ASTM A888, CISPI 301

Co-Extruded ABS

(Schedule40) X X X ASTM F1488 ASTM, D2661, ASTM D26801

Co-Extruded PVC

(Schedule40) X X X ASTM F1488, ASTM F891

ASTM D2665, ASTM F7941 , ASTM F1866

Copper

(Type DWV) X X X

ASTM B75, ASTM B251,

ASTM B302, ASTM B306 ASME B16.23, ASME B16.29

Galvanized Malleable Iron

X

ASME B16.3

Galvanized Steel

X

ASTM A53

PVC

(Schedule 40) X X X

ASTM D1785, ASTM

D2665, ASTM F7941 ASTM D2665, ASTM F7941 , ASTM F1866

Stainless Steel 304 X

ASME A112.3.1 ASME A112.3.1

Stainless Steel 316L X X X ASME A112.3.1 ASME A112.3.1

Vitrified Clay (Extra

strength)

X ASTM C700 ASTM C700

1 For Building Sewer applications.

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Clay Pipe

10

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PVC DWV Pipe

11

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ABS Pipe

12

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SDR Pipe

ASTM-D-3034

This product is listed per chapter 14

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Concrete

14

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Cast Iron Sewer Pipe

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718.3 No building sewer or other drainage piping or part thereof, which is constructed of materials other than those approved for use under or within a building, shall be installed under or within five (5) feet of any building or structure, or part thereof, nor less than one (1) foot below the surface of the ground. The provisions of this subsection include structures such as porches and steps, whether covered or uncovered; breezeways; roofed porte cocheres; (po rt-k-sher) roofed patios; carports; covered walks; covered driveways; and similar structures or appurtenances.

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Trenching

315.0 Trenches deeper than the footing of any

building or structure and paralleling the same

shall be not less than 45 degrees

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Backfill

315.3 Excavations shall be completely backfilled as

soon after inspection as practicable. to such piping.

Trenches shall be backfilled in thin layers to twelve

(12) inches above the top of the piping with clean

earth, which shall not contain stones, boulders,

cinder fill, frozen earth, construction debris, or other

materials that would damage or break the piping or

cause corrosive action.

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Water & Sewer

720.1 Building sewers or drainage piping of

clay or materials that are not approved for use

within a building shall not be run or laid in the

same trench as the water pipes unless both of

the following requirements are met:

(1) The bottom of the water pipe, at points,

shall be not less than twelve (12) inches above

the top of the sewer or drain line.

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(2) The water pipe shall be placed on a solid shelf

excavated at one (1) side of the common trench with

a clear horizontal distance of not less than twelve

(12) inches from the sewer or drain line. Water

pipes crossing sewer or drainage piping constructed

of clay or materials that are not approved for use

within a building shall be laid not less than twelve

(12) inches above the sewer or drain pipe.

Note: For the purpose of this section, within the

building shall mean within the fixed limits of the

building foundation.

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718.1 Building sewers shall be run in practical alignment and at a uniform slope of not less than one-fourth (1/4) of an inch per foot toward the point of disposal.

Exception: When approved by the building official and where it is impractical, due to the depth of the street sewer or to the structural features or to the arrangement of any building or structure, to obtain a Slope of one-fourth (1/4) of an inch per foot, any such pipe or piping four (4) inches through six (6) inches shall be permitted to have a slope of not less than one-eighth (1/8) inch per foot and any such piping eight (8) inches and larger shall be permitted to have a slope of not less than one-sixteenth (1/16) of an inch per foot.

Take a look at table 7-5 FN 5

Slope

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718.3 No building sewer or other drainage piping or

part thereof, which is constructed of materials other

than those approved for use under or within a

building, shall be installed under or within five (5)

feet of any building or structure, nor less than one (1)

foot below the surface of the ground.

Depth

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Size of Sewer

717.1 The minimum size of any building sewer shall

be determined on the basis of the total number of

fixture units drained by such sewer, in accordance

with Table 7-8. No building sewer shall be smaller

than the building drain.

Rule of thumb;

3-bath house minimum 3 sewer

4-bath house minimum 4 sewer 26

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Table 7-5

Maximum Unit Loading and Maximum Length of Drainage and Vent Piping

Size of Pipe, inches

(mm)

1-1/4

(32)

1-1/2

(40)

2

(50)

2-1/2

(65)

3

(80)

4

(100)

5

(125)

6

(150)

8

(200)

10

(250)

12

(300)

Maximum Units

Drainage Piping1

Vertical 1 22 16

3 32

3 48

4 256 600

1,38

0 3,600 5,600 8,400

Horizontal 1 22

83 14

3 35

4,5 216

5 428

5 720

5 2,640

5 4,6805

8,2005

Maximum Length

Drainage Piping

Vertical, feet 45 65 85 148 212 300 390 510 750

(m) (14) (20) (26) (45) (65) (91) (119) (155) (228)

Horizontal (unlimited)

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Table 7-5 Footnote