TITLE 77: PUBLIC HEALTH
CHAPTER I: DEPARTMENT OF PUBLIC HEALTH
SUBCHAPTER r: WATER AND SEWAGE
PART 890 ILLINOIS PLUMBING CODE
SECTION 890.APPENDIX A PLUMBING MATERIALS, EQUIPMENT, USE RESTRICTIONS AND APPLICABLE STANDARDS



Section 890.APPENDIX A Plumbing Materials, Equipment, Use Restrictions and Applicable Standards

 

Section 890.TABLE O Water Supply Fixture Units (WSFU) for a Supply System with Flushometer Water Closets

 

 

 

WSFU

Demand (GPM)

Pipe Size (Inches)

Pressure Loss (PSI/100'

of Pipe)

Velocity (Ft./Sec.)

Meter Size (Inches)

 

 

 

 

 

 

10

27

1"

8.3

6.8

"

12

28.6

1"

9.2

7.2

"

14

30.2

1"

10

7.9

"

16

31.8

1"

11

8.0

"

20

35

1"

6.0

6.4

"

25

38

1"

7.0

6.9

1"

30

41

1"

8.0

7.4

1"

35

43.8

1"

8.8

8.0

1"

40

46.5

2"

2.5

4.7

1"

45

49

2"

2.7

5.1

1"

50

51.5

2"

2.9

5.4

1"

60

55

2"

3.4

5.8

1"

70

58.5

2"

3.7

6.0

1"

80

62

2"

4.0

6.2

1"

90

64.8

2"

4.6

6.5

1"

100

67.5

2"

5.0

6.8

1"

120

72.5

2"

5.6

7.2

2"

140

77.5

2"

6.3

8.0

2"

160

82.5

2"

2.7

5.7

2"

180

87

2"

3.0

6.1

2"

200

91.5

2"

3.4

6.4

2"

225

97

2"

3.7

6.8

2"

250

101

2"

4.0

7.1

3"

275

106

2"

4.2

7.3

3"

300

110

2"

4.6

7.6

3"

350

119

3"

2.1

5.5

3"

400

126

3"

2.3

5.9

3"

450

138

3"

2.7

6.3

3"

500

145

3"

3.0

6.8

3"

600

160

3"

3.6

7.4

4"

750

178

4"

1.1

4.7

4"

1000

208

4"

1.5

5.6

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

321

6"

0.4

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 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 or meter yokes. Where local ordinances or community public water supply requirements cover such sizing, those requirements shall be followed.

 

(Source: Amended at 38 Ill. Reg. 9940, effective April 24, 2014)