Sewer Maintenance Programs

Sanitary Sewer Programs

Sewer Connection Repairs

Problem sanitary sewer service connections that require servicing more than twice per year are investigated and repaired where necessary. The investigation involves using a camera to view the inside of the connection to determine the problem and its location. The camera is inserted into the basement cleanout. The Region repairs or renews sanitary sewer services on private properties (single family, semi-detached, street townhomes and link houses) with separate direct connection to the sanitary sewer on the street, from the property line to within one metre of the house.

CCTV Inspection of Sewer Mains

All sanitary sewers in the Region are inspected by closed circuit television once every ten years. Storm sewers are inspected as required. The inspection program confirms the physical condition of the sewer and locates any problems which may require rehabilitation or replacement.

Hydrojet Cleaning of Sewer Mains

The cleaning of sanitary sewer mains by truck mounted hydrojets with vacuum capability is carried out as a regular maintenance program every two years. The cleaning operations remove buildups of debris and potential blockages. In some cases certain sanitary sewers over 300 mm in diameter may require "dragging", using a bucket to remove excessive amounts of grease. Sanitary sewers greater than 300 mm in diameter may be cleaned with the hydrojet where the flows are sufficiently low enough that debris may accumulate.

Rehabilitation / Repair of Sewer Mains

Sanitary and storm sewer mains that are found to be structurally deficient are repaired or rehabilitated. This type of work involves removal of grease, calcite and roots, sealing of joints, cracks and punctures and replacement of small sections of sewer main where necessary. One of the more common methods of rehabilitation is a trenchless technology which involves applying felt liners that are impregnated with epoxy resins and cured in place. This type of technology reduces costs by eliminating the need for full excavation and restoration.