•	The drainage is avoiding, since the reinforcement to the pipes is done with static loaded.
										•	Under certain conditions, the pipes can be reinforced while keeping in operation or in excavating sections.
										•	The cost of retrofitting is 1/3 to 1/3 of the value of the replacement of the pipes.
	
										•	The time of installation of the tendon is about half or third of the time used to replace a segment.