5.1 This is not a routine test. The values recorded are applicable only to the sewer being tested and at the time of testing.
1.1 This test method covers procedures for testing concrete pipe sewerlines, when using the negative air pressure (vacuum) test method to demonstrate the integrity of the installed material and the construction procedures. This test method covers testing of 4 to 36-in. diameter circular concrete pipe sewerlines utilizing gasketed joints.
Nominal | T (Time), | Nominal | T (Time), |
4 | 0.3 | 21 | 3.0 |
6 | 0.7 | 24 | 3.6 |
8 | 1.2 | 27 | 4.2 |
10 | 1.5 | 30 | 4.8 |