What is CIPP Sanitary Sewer Lining?

    Cured-in-Place-Pipe (CIPP) Sanitary Sewer Lining is a trenchless pipe rehabilitation method which consists of the cleaning and structural rehabilitation of the existing sewer main via installation of a CIPP liner.  The CIPP liner is a resin-impregnated flexible tube which when cured forms a hard and tight fitting liner within the existing sewer (ie. pipe within a pipe).

    CIPP Liners are installed through existing sewer manholes and will not require excavation of your street; however, sewer repairs completed via traditional excavation method may also be part of the project scope. Following cleaning and CIPP liner installation, existing sewer service connections are reinstated from inside of the rehabilitated pipe using robotic equipment.

    Why is the City installing CIPP Liners in this area?

    Previous assessments have indicated that the existing sanitary sewer mains being CIPP lined have structural and water infiltration issues and are in need of repair or replacement. Instead of replacing the sewer mains the City opted to rehabilitate the existing sewers with CIPP liners, as it has significant cost savings over replacement and still provides an anticipated life span of greater than 50 years.  In addition, since CIPP liners are installed through the existing sewer manholes, they do not require any excavation or tear-up of the street as would be required if the sewers mains were to be replaced by traditional excavation methods.

    How will this affect traffic and residential parking?

    Traffic interruptions and delays may be experienced during this project; however, kept to a minimum and two-way traffic will be maintained where possible.  Every reasonable effort will be made by the Contractor to maintain driveway access to properties located within the work site; however, residents may have to park on street temporarily during lining operations, if equipment is set-up in front of their driveway.

    Will there be service interruptions?

    YES. On the day the Contractor is installing the CIPP liner in the sewer main in front of your property a sewer service interruption (including the flushing of toilets or use of water fixtures/appliances such as dishwashers, clothes washers, running water down sinks, etc.) will be in place. 

    During other operations on the sanitary sewer main in front of your property, you are asked to limit the amount of water/sewer entering the sanitary sewer system. 

    You will be notified 24 hours in advance of any scheduled sewer service interruption by the Contractor.  The Contractors notice of “Sewer Service Interruption” will be hand delivered; however, if you are not at home a notice will be left at your door.

    Will I be able to flush toilets or use water fixtures/appliances during CIPP liner installation?

    NO.  During CIPP liner installation, residents will NOT be permitted to flush toilets or use water fixtures/appliances (such as dishwashers, clothes washers, running water down sinks, etc.) or anything else that drains to the sanitary sewer main. 

    Why can’t I flush toilets or use water fixtures/appliances during liner installation?

    The flushing of toilets or use of water fixtures/appliances (such as dishwashers, clothes washers, running water down sinks, etc.) during liner installation will cause a backup of water/sewer and flooding of your property, as the sewer service line from your property will be blocked by the liner at the sewer main.  In addition, the introduction of water into the sewer prior to completion of the liner installation process may damage the liner. 

    When will I be permitted to use water fixtures/appliances again?

    Once the CIPP liner installation process is complete and the sewer service line from your property is re-opened to the sewer main, you will be notified by the Contractor that the use of water and sewer fixtures is again permitted. The entire process may take up to 12 hours to complete.

    What should I do to prepare for CIPP sewer lining on my street?

    You should ensure that all plumbing drain traps (i.e. under sinks, tubs, washing machine, floor drains) have water in them, as water will prevent any potential orders from the sewer lining operations from entering your house through the pipes.  Simply flush your toilet, run water in all sinks and tubs for a minute and pour water into your basement floor drain. Frequently used drain traps typically have water in them; however, infrequently used drain traps may go dry.

    Will residents be assessed for this Civic Improvement?

    There will be no Civic Assessments charged to residents for this work since it is a rehabilitation of existing sanitary sewer main infrastructure.