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Sewer Line Maintenance
Common System Problems
Despite efforts to maintain the sewer system, complications sometimes occur. Common causes include:

Preventative Maintenance
Ongoing investigation and care helps the Wastewater Division maximize system performance and prevent repairs. Preventative maintenance may include the following procedures.

Visual Inspection
Maintenance crews regularly check manholes, frames and covers for cracks, breaks or missing parts, which may compromise their airtight integrity. Replacement and maintenance is scheduled as needed.

TV InspectionsTV Inspection of Lines
TV inspections are used to locate blockages and other sewer problems. Cameras are lowered into a manhole and pulled through the sewer line to identify the exact location of an obstruction or leak. This information eliminates "guess work" and unnecessary digging.

Smoke Testing 
By blowing smoke into a sewer line, crews can find breaks, improper connections and other system problems. This procedure sometimes identifies problems on the property owner’s side of the system. In these cases, property owners are notified and advised to make the appropriate repairs.

Chemical Root Treatment
Workers may treat select sewer mains with a foaming chemical root treatment. This foam kills existing roots and inhibits their regrowth.

Jet / Vacuum Cleaning

Vac-U-TruckSewer lines are often rinsed with a high-pressure water hose to remove roots or other debris. The material then is removed from the system with high-powered vacuum.  In 2014, the City of Allen purchased a second Vactor Truck to assist in this jet spray and vacuum cleaning. 

water sewer line