Method for repairing and reinforcing underground pipes

A method for repairing or reinforcing a pipe section, comprising the steps of:

• providing a liner assembly having a first end and a second end;
• applying an internal pressure to the liner assembly;
• inserting at least a portion of the liner assembly into the pipe section while maintaining the internal pressure;
• pushing the flexible liner assembly at least part of a distance through the pipe section while maintaining the internal pressure;
• pulling the flexible liner assembly at least part of the distance through the pipe section;
• releasing the internal pressure from the flexible liner assembly;
• and
• connecting portions of the flexible liner assembly to the pipe section so that the flexible liner assembly provides a substantially leak-free conduit through the pipe section.

A method for repairing or reinforcing a pipe section, comprising the steps of:

• determining a length of the pipe section;
• providing a flexible liner assembly having a first end, a second end, and a length within about 10% of the length of the pipe section;
• applying an internal pressure to the flexible liner assembly;
• maintaining the internal pressure using end plugs attached to the first and second ends of the flexible liner assembly;
• pushing the flexible liner assembly at least part of a distance through the pipe section while maintaining the internal pressure;
• releasing the internal pressure from the flexible liner assembly by removing the end plugs;
• and
• connecting the first and second ends of the flexible liner assembly to the pipe section so that the flexible liner assembly provides a substantially leak-free conduit through the pipe section.