Air Test Table
| ||||||
---|---|---|---|---|---|---|
Minimum Holding Time in Seconds Required for Pressure
to Drop From 3.5 PSIG to 2.5 PSIG
| ||||||
Pipe Diameter
| ||||||
Length Feet
|
4 inches
|
6 inches
|
8 inches
|
10 inches
|
12 inches
| |
25
|
4
|
10
|
18
|
29
|
40
| |
50
|
9
|
20
|
35
|
35
|
79
| |
75
|
13
|
30
|
53
|
83
|
119
| |
100
|
18
|
40
|
70
|
110
|
158
| |
125
|
22
|
50
|
88
|
138
|
198
| |
150
|
26
|
59
|
10
|
165
|
236
| |
175
|
31
|
69
|
123
|
193
|
277
| |
200
|
35
|
79
|
141
|
220
|
317
| |
225
|
40
|
89
|
158
|
248
|
340
| |
250
|
44
|
99
|
176
|
275
|
340
| |
275
|
48
|
109
|
194
|
283
|
340
| |
300
|
53
|
119
|
211
|
283
|
340
| |
350
|
62
|
139
|
227
|
283
|
340
| |
400
|
70
|
158
|
227
|
283
|
340
| |
450
|
79
|
170
|
227
|
283
|
340
| |
500
|
88
|
170
|
227
|
283
|
340
| |
550
|
97
|
170
|
227
|
283
|
340
| |
600
|
106
|
170
|
227
|
283
|
340
| |
650
|
113
|
170
|
227
|
283
|
340
|
Time
(seconds)
| ||||
---|---|---|---|---|
Depth of Manhole
(feet)
|
Diameter of Manhole
(inches)
| |||
48 inches
|
60 inches
|
72 inches
| ||
Up to 10
|
30
|
30
|
30
| |
12
|
30
|
30
|
34
| |
14
|
30
|
32
|
40
| |
16
|
30
|
37
|
45
| |
18
|
32
|
41
|
51
| |
20
|
35
|
46
|
57
| |
22
|
39
|
51
|
62
| |
24
|
42
|
55
|
68
| |
26
|
46
|
60
|
74
| |
28
|
49
|
64
|
80
| |
30
|
53
|
69
|
85
|