Municipal Trenchless Sewer Line Replacement

  New Tech in Repairing America's Aging Sewer Infrastructure

Trenchless Sewer Technology has been in use for the past few decades in municipal and industrial applications. It has become a very popular method of replacing failed underground sewer lines due to the minimally invasive process that requires little excavation. This means digging up city streets, and dismantling structures to repair or replace sewer lines is no longer necessary. Of course another major benefit to trenchless sewer replacement methods is cost and time savings to the public.

   "Trenchless" Means No Major Excavation Required

With thousands of miles of aging underground municpal sewer infrastructures engineers where faced with the challenge of how to rehabilitate these massive sewer lines economically and efficiently while causing minmal disruption to the public. Hence was introduced trenchless technology to rehabilitate sewer line infrastructures with a process that is so efficient and cost effective that is quickly becoming the standard of municipal sewer rehabilitation is cities and town across America and around thw world.


   Here is How It Works:

Depending on the conditions and accessibility of the existing sewer line, there are a few different trenchless methods used to repair or replace underground sewer lines today:

Trenchless Sewer Pipe Relining - This method of trenchless sewer line replacement is most commonly referred to as "No Dig" sewer line replacement as it usually requires no digging at all and can be performed from exsiting access points like cleanouts or manholes. This process uses Cured In Place Pipe or CIPP and involves putting a new liner inside the existing sewer pipe. The existing pipe is first blown clean of debris using hydro jetting and then the new epoxy coated liner is blown into place using high pressure air. A bladder is then inserted and inflated with high pressure steam to cure the new liner. Once the new liner is cured in just a few hours, the bladder is removed and the result is a new pipe within a pipe that is seamless and rated to last for decades.

Trenchless Pipe Bursting - If the existing sewer line is too damaged to use relining, then trenchless pipe bursting is the next option. This method requires two small access holes at each end of the existing sewer pipe. A cable is fed through the length of the sewer line and attached to a tool called a bursting head on the other end. The bursting head is attached to a new sewer line that is made of high density polyethylene. The bursting head is pulled through using a powerful hydraulic winch and breaks up the old pipe while pulling in the new. With this method, the new pipe being installed can be of a larger diameter if preferred to allow for future growth of the property.


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(NMP) Trenchless Sewer Line Replacement 2012

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