TITLE 77: PUBLIC HEALTH
PART 890 ILLINOIS PLUMBING CODE
CHAPTER I: DEPARTMENT OF PUBLIC HEALTH
SECTION 890.APPENDIX A PLUMBING MATERIALS, EQUIPMENT, USE RESTRICTIONS AND APPLICABLE STANDARDS
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Section 890.APPENDIX A Plumbing Materials, Equipment, Use Restrictions and Applicable Standards

 

Section 890.TABLE K Size and Length of Vents

 

Size of Soil or Waste Stack

Fixture Units Connected

Diameter of Vent Required (Inches)

1

1

2

2

3

4

5

6

8

Maximum Length of Vent (Feet)

1

2

30

 

 

 

 

 

 

 

 

1

8

50

150

 

 

 

 

 

 

 

1

10

30

100

 

 

 

 

 

 

 

2

12

30

75

200

 

 

 

 

 

 

2

20

26

50

150

 

 

 

 

 

 

2

42

 

30

100

300

 

 

 

 

 

3

10

 

30

100

200

600

 

 

 

 

3

30

 

 

60

200

500

 

 

 

 

3

60

 

 

50

60

400

 

 

 

 

4

100

 

 

35

100

260

1,000

 

 

 

4

200

 

 

30

90

250

900

 

 

 

4

500

 

 

20

70

180

700

 

 

 

5

200

 

 

 

35

80

350

1,000

 

 

5

500

 

 

 

30

70

300

900

 

 

5

1,100

 

 

 

20

50

200

700

 

 

6

350

 

 

 

25

50

200

400

1,300

 

6

620

 

 

 

15

30

125

300

1,100

 

6

960

 

 

 

 

24

100

250

1,000

 

6

1,900

 

 

 

 

20

70

200

700

 

8

600

 

 

 

 

 

50

150

500

1,300

8

1,400

 

 

 

 

 

40

100

400

1,200

8

2,200

 

 

 

 

 

30

80

350

1,100

9

3,600

 

 

 

 

 

25

60

250

800

10

1,000

 

 

 

 

 

 

75

125

1,000

10

2,500

 

 

 

 

 

 

50

100

500

10

3,800

 

 

 

 

 

 

30

80

350

10

5,600

 

 

 

 

 

 

25

60

250

 

Agency Note: Per Section 890.1580(e), no more than 20 percent of the maximum developed length may be installed in the horizontal position. Vent piping serving floor drains shall be installed in such a manner as to minimize horizontal vent distances.