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A comment on Health Concerns Mount as More Old Sewer Pipes Are Lined with Plastic. Parent comment

Re:Health Concerns Mount as More Old Sewer Pipes Are Lined w... by ryanobjc on Tuesday November 26, 2019 @01:06PM (#21640870)
Concrete is porus to water. If water can seep thru, when it’s not cracked, air can as well.
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Re:Health Concerns Mount as More Old Sewer Pipes Are Lined w... by blawson on Tuesday November 26, 2019 @05:16PM (#21643320)
Water molecules are smaller than air though, so a surface can be airtight and not be watertight.
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