Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 370 - ILLINOIS RECOMMENDED STANDARDS FOR SEWAGE WORKS
Subpart L - NUTRIENT REMOVAL
Appendix C - Table No. 3 - Air Test Table for Sanitary Sewer Leakage Testing*

Universal Citation: 35 IL Admin Code ยง C
Current through Register Vol. 48, No. 12, March 22, 2024

SPECIFICATION TIME (MIN:SEC) REQUIRED FOR PRESSURE DROP

FROM 31/2 TO 21/2 PSIG WHEN TESTING ONE PIPE DIAMETER ONLY

Length of Sewer Pipe

In Feet

PIPE DIAMETER, INCHES

4

6

8

10

12

15

18

21

24

25

0:04

0:10

0:28

0:28

0:40

1:02

1:29

2:01

2:38

50

0:09

0:20

0:35

0:55

1:19

2:04

2:58

4:03

5:17

75

0:13

0:30

0:53

1:23

1:59

3:06

4:27

6:04

7:55

100

0:18

0:40

1:10

1:50

2:38

4:08

5:56

8:05

10:34

125

0:22

0:50

1:28

2:18

3:18

5:09

7:26

9:55

11:20

150

0:26

0:59

1:46

2:45

3:58

6:11

8:30

175

0:31

1:09

2:03

3:13

4:37

7:05

200

0:35

1:19

2:21

3:40

5:17

12:06

225

0:40

1:29

2:38

4:08

5:40

10:25

13:36

250

0:44

1:39

2:56

4:35

8:31

11:35

15:07

275

0:48

1:49

3:14

4:43

9:21

12:44

16:38

300

0:53

1:59

3:31

10:12

13:53

18:09

350

1:02

2:19

3:47

8:16

11:54

16:12

21.10

400

1:10

2:38

6:03

9:27

13:36

18:31

24:12

450

1:19

2:50

6:48

10:38

15:19

20:50

27:13

500

1:28

5:14

7:34

11:49

17:01

23:09

30:14

*From Standard Specifications for Water and Sewer Main Construction in Illinois, Fourth Edition, May, 1986. (Copies may be obtained from Illinois Society of Professional Engineers, Springfield, Illinois 62704.)

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