This Recommendation describes methods to install optical cables inside sewer ducts. which applies to both the cable installation and the pre-installation of an infrastructure if requested. This document covers both man and non man accessible sewer ducts. This Recommendation is not intended to address all of the safety concerns, if any, associated with its use. Therefore, it shall be users' responsibility of this Recommendation to establish appropriate safety and health practices and determine the applicability of regulatory limitations, if any, prior to its use.