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 N Water Supply Fixture Units (W.S.F.U.) for a Supply System with Flush Tanks

 

Water Supply Fixture Units (W.S.F.U.) for a

Supply System with Flush Tanks

 

W.S.F.U.

Demand

(GPM)

Pipe Size

(Inches)

Pressure

Loss

(PSI/100'

of Pipe)

Velocity

(Ft./Sec.)

Meter Size

(Inches)

 

 

 

 

 

 

2

2

"

4.2

2.7

⅝"

4

3

"

8.7

4.2

⅝"

6

5

"

22.5

7.0

⅝"

8

6.5

"

6.3

4.3

⅝"

10

8

"

9.0

5.4

"

12

9.2

"

11.5

6.1

"

14

10.4

"

15.0

6.9

"

16

11.6

"

18.0

7.7

"

20

14

1"

7.2

5.6

"

25

17

1"

10.0

6.6

"

30

20

1"

13.6

8.0

1"

35

22.5

1"

5.8

5.7

1"

40

25

1"

7.0

6.3

1"

45

27

1"

8.2

6.9

1"

50

29

1"

9.5

7.4

1"

60

32

1"

5.0

5.8

1"

70

35

1"

6.2

6.4

1"

80

38

1"

7.0

7.2

1"

90

41

1"

8.0

7.5

1"

100

43.5

1"

8.7

7.8

2"

120

48

2"

2.7

5.0

2"

140

52.5

2"

3.1

5.4

2"

160

57

2"

3.6

5.8

2"

180

61

2"

3.9

6.1

2"

200

65

2"

4.5

6.6

2"

225

70

2"

5.2

7.1

2"

250

75

2"

6.0

7.7

3"

275

80

2"

2.6

5.5

3"

300

85

2"

2.9

5.8

3"

350

95

2"

3.5

6.5

3"

400

105

2"

4.2

7.1

3"

450

115

2"

5.0

8.0

3"

500

125

3"

2.3

5.9

3"

600

145

3"

3.1

6.8

4"

750

170

3"

4.0

8.0

4"

1000

208

4"

1.5

5.7

4"

1250

240

4"

1.9

6.4

4"

1500

267

4"

2.3

7.0

4"

1750

294

4"

2.8

7.8

4"

2000

320

6"

0.36

3.7

6"

 

Agency Notes:

 

Where a unit of local government or the community public water supply does not require separate water service lines for irrigation or similar systems that are likely to impose continuous demands (e.g., lawn sprinkler or air conditioning systems), the following rule applies: estimate the continuous demand (in gallons per minute) for each outlets/systems separately from the intermittent demand from the above fixtures, and add this amount to the demand of the fixtures (in gallons per minute).

 

Meter and meter yoke sizes shown in this table shall apply only to those jurisdictions or governmental units where local ordinances or community public water supply requirements do not prescribe specific sizes of meters and/or meter yokes. Where local ordinances or community public water supply requirements cover such sizing, those requirements shall be followed.

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(Source: Amended at 22 Ill. Reg. 21540, effective December 1, 1998)