Page 354 - Trenchless Technology Piping Installation and Inspection

N/A N/A Tape should be N/A removed to prevent potential flow blockage. No deduction, If leaking 1. Should be repaired N/A assuming a proper between the if leaking seal is achieved existing pipe and at each end and the CIPP, inject a lateral. If contractor hydrophilic type chooses not to g

Seam tape inadequately bonded during manufacture. Insufficient pressure 1. to fully expand the liner. The end of the liner 2. was not pulled sufficiently into the manhole for full expansion at the manhole face. A factor of existing 3. pipe geometry. Small gap between liner and existing

Seam tape, loose, blistered or leaking Annular space between existing pipe and liner at manhole/ annular space (AS) Ground water leakage between the liner and existing pipe at the manhole Adapted from NASSCO TABLE 7.10

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