Method of repairing an existing pipe

A method of repairing an existing pipe, comprising the steps of:

• introducing at least one leading pig into the existing pipe through one open end thereof;
• introducing behind the leading pig a necessary amount of adhesive agent into the existing pipe through the same open end thereof;
• fixing one end of a liner tube at the open end of the existing pipe, in a manner such that the liner tube may be reversed into the existing pipe and connecting the other end of the liner tube with a wire which is used for enabling the liner tube to pass through bent portions of the existing pipe;
• and
• providing a negative pressure into the existing pipe through an opposite end thereof to cause the leading pig and the adhesive agent to move forwardly and to cause the unfixed portions of the liner tube to be reversed into the existing pipe;
• wherein the method further includes the steps of
• reducing a suction force caused by the negative pressure;
• pulling back on the wire causing the liner tube to move back a short distance;
• and
• suddenly raising the suction force to enable the liner tube to reverse and move through a bent portion of the existing pipe;
• wherein the adhesive agent is caused to move through the existing pipe in the form of a plug flow which coats the whole internal surface of the existing pipe with the adhesive agent which ensures that the liner tube reversed into the pipe adheres to the internal surface of the existing pipe.