Clearing blockages in a pipe by blowing air through a duct moved in the same pipe prior to fibre installation

摘要

A method of installing an optical fibre in a pre-installed underground pipe (1) between two locations, process comprising: installing a duct (11) through the underground pipe by: attaching an adaptor (15) to one end of said duct; attaching the other end of said duct to an air compressor (13); blowing air through said sub-duct as it is moved along the length of said underground pipe, the air being blown out of the adaptor at a sufficient pressure so as to dislodge debris (7) within the pipe; and once the sub-duct has traversed the duct, removing the adaptor and blowing the optical fibre along the length of the sub-duct between the two locations.