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VACUUM INFILTRATION
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Two lengths of randomly selected hubless cast iron soil pipe
were joined with an MG COUPLING, torqued to 175 inch-pounds,
and the ends of the assembly were sealed. A vacuum was pulled
on the assembly for a period of 24 hours. |
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| MG COUPLING (sizes tested) |
Vacuum (inches Hg) |
Vacuum after 24 hours
(inches Hg) |
Results |
| 2" |
26 |
26 |
No Vacuum Loss |
| 3" |
25 |
25 |
No Vacuum Loss |
| 4" |
25 |
25 |
No Vacuum Loss |
| 5" |
25 |
25 |
No Vacuum Loss |
| 6" |
25 |
25 |
No Vacuum Loss |
| 8" |
25 |
25 |
No Vacuum Loss |
| 10" |
25 |
25 |
No Vacuum Loss |
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