Make sewer operations faster, cheaper, and safer.


0 human life at risk

visual inspections are all performed from a safe distance


40% cost reduction

in average, behind FTE reduction and pipe cleaning efficiencies


900M/day inspected

in average vs 400m using the conventional methods

Successful maintenance of sewer systems requires regular inspection to stay on top of the developing deterioration

In some of the world’s largest cities, underground systems are aging and reaching maturity. Extreme weather patterns put repeated stress on our infrastructures. As a result, many municipalities have enforced strict maintenance schedules and requirements.
With Flyability’s indoor drones, effectively perform full assessment of sewers systems and be proactive with the need for potential repairs.

3D model used to measure the length of the pipe and precisely locate the points of interest.

3D model used to measure the length of the pipe and precisely locate the points of interest.



Close the gap vs. traditional inspection methods

The quick deployment time and the ability to either screen a whole area or quickly get details of specific sections make drone inspection ideal for time-critical inspection.


Inspect inaccessible places

Access sections of sewer systems through manholes and other small entry points, allowing inspectors to collect visual data regardless of access issues.


Pinpoint & document the location of defects

In line with official reporting standards, pinpoint the exact location of defects found in your inspection so they can be evaluated and maintenance can be performed quickly.


Collect high quality visual data

Provide a crystal clear view of the asset. The drone allows for more control in data capture than other RVI tools like CCTV or more expensive robotics solutions.


Reduce emergency response time

Quickly identify the cause of a problem during a sewer emergency and fix it.


Improve inspection capabilities

Carry out regular inspections to identify potential issues and address them as part of routine maintenance.

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How to plan drone missions for sewer inspections



Upstream work & planning

To start out, pilots plan the flight with local inspection teams, including considerations about access points, sewer geometry and diameter, security, and the extent or need of aerial equipment (i.e., drones).


General inspection flight

When conducting an inspection flight, the drone pilot works closely with the wastewater inspector overseeing the inspection, ensuring that they’re getting all the visual data they need. During the flight, our drone quickly travels a length of sewer pipe capturing point clouds data, 4k video in RGB with thermal overlay and 12Mpx still Inspection images.



Downstream work & reporting

Afetr the inspection, the data collected can be reviewed and analyzed. This includes localising points of interests, categorizing and commenting them, extracting pictures and video sequences. This data can also be used to draft official reports, compliant with EU norms (13508-2).

Mission deliverables

report-icon-smallData enabling creation of official reports, compliant with EU norms (13508-2)
picture-icon-smallHigh resolution pictures and 4K videos of point of interests recorded during the mission
pinpoint-icon-smallPoint clouds and 3D maps enabling centimeter accurate distance measurements


Extend the range of your drone

In underground environments, signal propagation can be limited by the geometry of the place. 
The range extender allows you to overcome these challenges by extending the range of your drone.

Without the range extender
With the range extender

Learn More

drone in sewer white half sewers bg image - mobile


Capture every corner of the most confined sewer systems, from a safe location

Our drones have proven effective in identifying accumulated rocks, mud, or silt-creating clogs; assessing the functionality of networks; and exposing potential structural problems like root intrusion that could cause masonry to collapse, provoking the failure of the sewer system.

Related Products

Elios 3

Digitizing the

Built to keep humans safe, the Elios 3 features a unique collision-tolerant cage that helps inspectors to collect data in confined spaces that have been inaccessible in the past.
Relying on the power of computer vision and LiDAR mapping, Elios 3 allows pilots to navigate inside industrial assets building a real-time 3D view of the drone's environment and trajectory.  
Learn more

FLyability + FARO logo


Highly accurate flying mobile scanner

Safely create centimeter accurate scans of hard-to-reach areas, with the Elios 3 Surveying Payload.

Learn More

Software Solution


With WinCan end-to-end software solution, process the data collected by Elios 2, annalyse it and quickly create detailed, standards-compliant reports.
Lean More


Range extender

In underground environments, signal propagation can be limited by the geometry of the place. The range extender allows you to overcome these challenges by extending the range of your drone.

Learn More


See how Elios has changed the way Veolia
performs water and wastewater inspections


“Thanks to Elios 3, we’ve effectively eliminated most of the risks associated with these confined spaces.”

Julien Maj
Local Service Manager at Veolia Water

They already trust our products

Veolia Logo
AECOM logo
SARP logo


Learn how municipalities or inspection companies are using our drones across the world

Sewer 154883483751

Bringing safer confined space sewer inspections to Sydney with the Elios 3

Sewer 123756979336

Veolia Water increase safety and efficiency of their inspections with Elios

Sewer 72486101850

Elios 3’s Indoor 3D Mapping Helps City of Lausanne in Water Department Inspections

Frequently Asked Questions

In order to operate a drone, do you have to be an engineer, an NDE inspector or a piping inspector?

No, it is not required but you should always be aware of the regulations concerning commercial drone operations in your area before flying). Piloting Elios drones is accessible to everyone who has completed the introductory training. Traditionally our clients work in teams of two when running inspections, one pilot and one inspector who can analyze the data on the spot. With this approach, each person can focus on their area of expertise.

How do I train my team?

Flyability has put in place a complete certification and training program that takes drone pilots from discovering the particularities of piloting a drone indoors BVLOS (Beyond Visual Line of Sight), to being able to perform the most difficult indoor inspection missions. The certification tests the pilots on their ability to assess the difficulty of a mission and puts their own piloting skills into perspective. Our training courses are defined and provided by professional pilots with extensive mission track records using Elios drones. Every bit of theory you will learn is backed-up by practical exercises directly applicable to your everyday job as a pilot. Operators following our training courses receive a valuable professional certification, acknowledging their proficiency at using Elios drones.

Do I need to adapt my Standard Operating Procedures?

Asset owners are responsible for deciding whether to modify their SOPs to accommodate the use of drones. Nevertheless, SOPs provide a method to communicate the process changes to employees. As they no longer rely on humans to enter confined spaces for inspection, most of our customers update SOPs to take the drone into consideration.

Can a drone be used as a formal inspection tool?

Several clients have conducted formal inspections using our products that have been approved by classification societies. You can read more about an example in this article:
The thing to note is that drones can't permanently be recognized as a formal inspection tool, since inspectors are agnostic to specific tools. Rather, inspectors can approve a given tool in a specific inspection when they see the data it can produce.

How to process inspection data?

Once your mission is complete, you can simply connect Elios 3 to your computer using the USB 3.0 port fitted on the top of the drone to import all your work in Inspector, our companion software.

After retrieving the flight data, you have immediate access to a high resolution point cloud of your assets that you can visualize using Inspector. You can then review your POIs and document your inspection by taking notes in the POIs, making measurements, and exporting your data as a report.

Does Flyability keep your data safe from cyber attack?

As long as the user does not manually connect to a WiFi network, there is no physical link between the Elios system and the internet—ensuring complete data safety.
In addition, Flyability only collects data in one instance: when the drone is armed while the tablet on the GCS is connected to the internet. In these cases, we collect the unit ID — which is encrypted and can only be read by Flyability —, the time of flight, and the firmware version. Operators are notified of this and have the option to opt-out.

For more information on the data safety, please consult the following link:
Cyber Security With Flyability Drones

Are Flyability drones intrinsically safe?

ATEX is the European certification given to equipment tested and approved to be intrinsically-safe.
The Elios drones are not ATEX rated / intrinsically safe. It is hardly possible for a drone to be intrinsically safe (none to date).
You will need to perform a procedure to neutralize the environment of the asset you want to inspect like you would do when doing a manned inspection. You still have a lot to gain when performing the inspection with a drone instead of a human. For example, you can use nitrogen to neutralize the asset and send in a drone right away. If you do the same for a manned inspection, the inspector would have to carry a breathing apparatus and you would need to deploy bystanders, which is much more complicated and dangerous.
For more information on this subject, please follow the link:

Can I fly Elios drones outdoors?

Flyability drones can fly outdoors in ATTI mode to inspect outdoor assets. However, it is not recommended to do so as it is much harder to control the drone in ATTI mode. This use case is reserved to experienced pilots only. Keep in mind that flying outdoor is subject to airspace regulations, unlike indoor flights.

Should I insource or outsource drone-based inspections?

It depends on your usage and the regulations in place. Some industries may require a qualified and certified inspector to perform an inspection. In case you would like to outsource, there are service providers that use the Elios drones all around the world.

For more information on outsourcing, consult the following links:

Insourcing versus outsourcing your industrial inspection drone program

Drone Inspections Insourcing vs Outsourcing Your Drone Inspection Program

What is the size of the smallest defect that Elios drones can spot?

With Elios 2 & 3, you can capture images with a Ground Sampling Distance of 0.18 mm/pixel when standing at 30 centimeters from the surface you inspect. With this accuracy, you can easily spot defects that are a few millimeters wide such as small cracking patterns in the walls or a hole inside of silos.


For more information on the resolution of the Elios 2 camera:

Drones Camera Resolution: Three Metrics You Should Know About


For more information on the types of data the Elios 2 can collect: