Services

Horizontal Directional Drilling: Trenchless New Installation of Wastewater Pipes

Laying new pipes without excavation

Horizontal Directional Drilling is the most economical method for the trenchless new installation of wastewater pipes, especially when rehabilitation of the old pipe is no longer possible or uneconomical. It is the ideal solution when the new route runs under surfaces such as gardens, asphalted paths, or buildings that should remain untouched.Using a precisely controlled drill head, we create an underground channel that ensures the necessary gradient for the new wastewater pipe. Only a small starting and target pit are required on the surface. The areas in between remain completely intact.

Frequently asked questions about horizontal drilling

Here you can find answers to the most frequently asked questions about horizontal drilling.

When does horizontal drilling make sense for my sewer pipe?

Horizontal drilling is the ideal solution in two main scenarios. First, when your old sewer pipe is so badly damaged that trenchless rehabilitation (such as CIPP lining) is no longer technically possible or economically viable. Second, when a completely new sewer connection has to be created, e.g. for a new building, and the pipe route has to pass underneath surfaces such as gardens, driveways or existing buildings.

What are the requirements for horizontal drilling?

The most important requirement is sufficient space in the ground. Since we work precisely and safely, legal safety distances from other existing lines, such as electricity or gas pipes, must be maintained. Our experts therefore always check the exact circumstances first as part of an on-site analysis. Only after this feasibility check do we give final approval for the project and ensure that this is the best solution for you.

Do you also handle the connection work and construction work?

We offer a complete solution from a single source. Our service does not end with the drilling. Our specialists make sure the new pipe is properly connected to the public sewer and to your building’s drainage system. In addition, our team carries out all the necessary construction work, from digging the small launch and reception pits to professionally restoring all surfaces afterwards.

What happens to the old, damaged pipe?

As soon as the new, separate pipe has been installed by horizontal drilling, the old, defective pipe is no longer needed. As part of our comprehensive service, we make sure that the old pipe is properly decommissioned. As a rule, it is cleaned, permanently sealed at both ends and remains safely in the ground. This prevents any risk of the ground collapsing or subsiding later on.

How does this differ from CIPP lining?

CIPP lining repairs and renews the existing pipe from the inside. It is a “pipe-in-pipe” method. Horizontal drilling, on the other hand, does not use the old pipe at all. Instead, a completely new, independent pipe route is created underground. This is always the necessary solution when the old route is unsuitable or the damage is too severe for rehabilitation from the inside.

Horizontal directional drilling explained

Horizontal directional drilling

Horizontal directional drilling is the most economical method for installing new pipes without trenches, especially when the old pipe can no longer be rehabilitated. A special drilling rig “shoots” a new pipe route underground without having to open up large areas of gardens, paths or asphalt. Only a small launch pit and a small reception pit are required.

An important requirement, however, is a sufficient safety distance from other utility lines, such as gas pipes. That is why our experts check feasibility before we give you a recommendation and start work.

Key features at a glance:

  • Application: Trenchless installation of new pipes when rehabilitation is technically impossible or uneconomical.
  • Key advantage: The most economical way to install new pipes, with only minimal surface intervention.
  • Technical details: Suitable for new pipes with a diameter of up to 500 mm.

Service Area for Pipe Cleaning, Sewer Rehabilitation & Sewer Technology

We offer our full range of services to private households, property management companies, and commercial businesses throughout Vienna, Lower Austria, and Burgenland. For larger jobs and planned projects, we also operate on a supra-regional basis.

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Pipe Cleaning & Drain Clearing in Vienna

We provide fast and reliable pipe clearing services across all 23 districts of Vienna. DerKanal is your specialist for professional pipe and sewer cleaning as well as rapid drain clearing – whether in Donaustadt, Favoriten, or Floridsdorf. From our main office in 1230 Vienna-Liesing, we coordinate every job directly across the entire city area.

Sewer technology in Vienna, Lower Austria & Burgenland

Our entire service portfolio is available to you without restriction throughout Vienna, Lower Austria, and Burgenland. DerKanal is your reliable specialist for professional drain cleaning, trenchless sewer rehabilitation, separator cleaning, and leak testing. Whether in St. Pölten, Wiener Neustadt, Baden, Mödling, Klosterneuburg, Eisenstadt, Neusiedl am See, or Oberwart—we provide all services directly on-site.

Major projects & specialized work across Austria

For comprehensive and planned projects—such as liner rehabilitation, specialized milling work, and backflow protection—we extend our service radius to support you in Styria (e.g., Graz, Leoben, Kapfenberg), Upper Austria (e.g., Linz, Wels, Steyr), Carinthia (e.g., Klagenfurt, Villach, Wolfsberg), and Salzburg.