Trenchless Sewer Rehabilitation

   New Sewer Pipe Replacement Technology

The process of replacing and entire sewer line with minimal excavation is called trenchless sewer rehabilitation. This process involves installing a new sewer pipe without the need for extensive excavation. Trenchless Sewer Rehabilitation has been widely implemented by cities, towns, and private businesses and now residential properties across the country to replace aging, leaking and failing underground sewer infrastructure as it is highly efficient, saves millions in collateral construction costs, is enviromentally friendly and causes little disturbance to the public.

   Methods of Trenchless Sewer Rehabilitation

Methods used for trenchless sewer rehabilitation vary depending on the conditions of the exsiting sewer pipe which can be determined by a sewer camera inspection to view the interior of the broken sewer line to see how extensively damaged it is. Pipes that are still in fairly good condition can usually be relined using what's called CIPP or Cured In Place Pipe. If the existing sewer line is badly damaged or crushed than the second option is the Sewer Pipe Bursting method.



  Method 1 - Trenchless Sewer Relining With CIPP

Sewer Relining with CIPP is the process of lining the interior of the old sewer line from one small acces point with a new flexible and seamless PVC infused liner to seal all cracks, voids, as well as bridge gaps. The old sewer line is first blown free of roots, dirt and debris using a process called hydro jetting. Once the old sewer line is cleaned and prepared it is now ready to recieve the new liner. The liner is first saturated with environmentally approved epoxy resin to 100% saturation and then it is blown into the old pipe using high pressure air. Once the liner is in place, a bladder is then insterted the full length of the new liner and inflated with hot, high pressure steam that molds the new liner to the interior of the old sewer pipe. Once the liner is cured the bladder is removed leaving a brand new super strong pipe within a pipe that is stronger than the original pipe and because it is seamless, is now highly resistant to future root intrusion, the leading cause of sewer line failures.


   Method 2- Trenchless Pipe Bursting

Trenchless Pipe Bursting is used when CIPP is not an option because the existing sewer line is to damaged to recieve a new liner and must be completely replaced. Pipe bursting is also performed with very little excavation as it only requires one small access point at each end of the old sewer line. Once the two small access holes are made, a heavy cable is fed through the existing sewer line from one end and attached to the front of a spear shaped tool called a bursting head. The bursting is in turn is securely fastened to a brand new length of HDPE or High Density Polyethylene sewer pipe that is made seamless by welding all the joints. The cable is then pulled with a very powerful hydraulic winch that pulls the bursting head through the old pipe easily breaking it up or "bursting" the old pipe while simultaneously towing the new pipe in behind it. The result is a brand new length of sewer line that is now completely seamless, flexible and highly resistant to stress, root infestation, and completely air and water tight.


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(NMP) Trenchless Sewer Line Replacement 2012

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