Sewerage: tracing solutions for pipes and drainage networks

Q: Which dye should be used to trace a pipe?

The choice depends on:The water volumeThe flow rateThe distanceThe expected dilutionThe visibility of the control pointsThe available detection methodA visible dye is often suitable for direct observation. A fluorescent tracer may be more appropriate when the signal is weak or difficult to identify.

Q: How long does it take for the tracer to appear?

The time depends on:The length of the pipeIts gradient and diameterThe flow rate; the water volumeAny areas of retentionThe layout of the networkA short pipe with a steady flow will generally produce faster tracer recovery than a long network with stagnant areas.

When plans are incomplete or the route of a pipe is uncertain, tracing makes it possible to follow the actual movement of water between several points in the network. This method can help verify a connection, identify where a drain leads, distinguish wastewater from stormwater or confirm communication between several manholes and collectors. Fluotechnik offers visible dyes, fluorescent tracers, kits and equipment for sewerage, maintenance, building inspection and civil engineering professionals. These solutions can be used in pipes, manholes, downpipes, connections, collectors, basins and drainage structures before maintenance, repairs, compliance work or network extensions.

Inspection of sewer networks

Monitor flows through wastewater, stormwater and combined sewer systems.

Connection verification

The appearance of the tracer in a manhole, collector or outlet helps confirm where a drain leads.

Differentiation between several networks

Use different colours or signals to compare branches and flow paths.

Visible or fluorescent detection

Choose direct visual observation or detection under a UV lamp according to network conditions.

Expert technical support

Fluotechnik helps you select the product and dosage according to the flow rate, distance, water volume and detection method.

Inspection of sewer networks

Monitor flows through wastewater, stormwater and combined sewer systems.

Connection verification

The appearance of the tracer in a manhole, collector or outlet helps confirm where a drain leads.

Differentiation between several networks

Use different colours or signals to compare branches and flow paths.

Visible or fluorescent detection

Choose direct visual observation or detection under a UV lamp according to network conditions.

Expert technical support

Fluotechnik helps you select the product and dosage according to the flow rate, distance, water volume and detection method.

Our solutions for tracing sewer networks

The right solution depends on the network layout and the information being sought. A visible dye may be sufficient to check water movement quickly between two accessible manholes. A fluorescent tracer may be more appropriate when dilution is significant, tracer recovery is weak or observation conditions are difficult. For regular operations, complete kits bring together several useful components, such as tracers, dosing accessories, containers and detection equipment, depending on the configuration.

Fluotechnik offers a range of solutions for inspecting pipes and drainage networks

Visible tracing dyes
Fluorescent tracers
UV dyes that are colourless under natural light
Complete water tracing kits
UV lamps and detection accessories
Inflatable pipe plugs
Smoke generators and complementary equipment

What is pipe tracing used for in sewerage systems?

Pipe tracing consists of introducing an identifiable substance into a drain and then monitoring the different points where it may reappear. This method is particularly useful when the network route is unknown, when plans no longer reflect the actual installation or when several pipes appear to follow similar paths.

In a sewer network, tracing can be used to:

Check that a drain reaches the correct manhole or collector
Distinguish a wastewater network from a stormwater network
Identify where a pipe or downpipe leads
Confirm communication between different sections of the network
Follow a flow to its outlet
Compare several connections
Prepare cleaning, repair or modification work
Inspect a connection before compliance work

The selected solution then depends on the conditions of the operation. A visible dye makes rapid checks easier when tracer recovery points are accessible. A UV tracer can improve detection when the product is highly diluted or when the signal needs to remain discreet under normal lighting. Professionals who need the product, dosing accessories and detection equipment in a single set can also choose a complete water tracing kit.

How do you trace a pipe or inspect a sewer network?

A tracing test should be prepared according to the network, flow rate, water volume, distance between the points and purpose of the inspection. The method consists of introducing a tracer into a clearly identified pipe and then observing the manholes, collectors, outlets or discharge points where it may reappear.

Step 1 - Identify accessible points

Begin by identifying the different points that can be used for injection or observation:

Tnternal drain
Trap
Downpipe
Manhole
Connection
Collector
Basin
Pumping station
Outlet or discharge point

This preliminary inspection helps determine the likely direction of flow and organise the monitoring process.

Step 2 - Define the purpose of the inspection

The test may be used to:

Identify where a pipe leads
Verify a connection
Distinguish wastewater from stormwater
Check the connection of a downpipe
Confirm communication between two manholes
Follow a flow to a collector or outlet.

A clearly defined objective limits the number of points that need to be monitored and helps select an appropriate method.

Step 3 - Choose the tracer and detection method

A directly visible dye is suitable when tracer recovery can easily be observed in a manhole or at the network outlet.

A fluorescent tracer may be preferred when:

Significant dilution is expected
The flow rate is high
The signal may be difficult to see
The area is dark or difficult to inspect
Detection under a UV lamp is preferable
The colour needs to remain discreet under natural light

When several injections are carried out, different colours or fluorescent signatures can help distinguish between the connections.

Step 4 - Adjust the dosage

The quantity of product depends in particular on:

The water volume
The flow rate
The length of the pipe
The diameter of the pipe
The expected dilution
The number of control points
The type of tracer
Observation conditions

A dosage that is too low may make tracer recovery difficult to detect. An excessive quantity does not necessarily improve the quality of the diagnosis and may make the results harder to interpret.

Step 5 - Introduce the tracer into the network

The product is introduced at the selected point and then carried through the pipe using a quantity of water suited to the protocol. The time of injection should be communicated to the people monitoring the different control points so that the tracer recovery time can be recorded accurately.

Step 6 - Monitor manholes and outlets

Manholes, collectors, outlets, basins and other accessible points should be inspected for a period suited to the length and layout of the network. When detection relies on a fluorescent tracer, a suitable UV lamp can make weak signals easier to identify.

Step 7 - Compare the observations

The location, time and intensity of tracer recovery provide information about the route taken by the water.

These observations may help to:

Confirm a connection
Identify an incorrect connection
Compare several flow paths
Identify retention or slower flow
Prepare further investigations or work

Why choose Fluotechnik for tracing your sewer networks?

Le contrôle d’un réseau ne repose pas uniquement sur le choix d’une couleur. La longueur des conduites, le débit, la dilution, l’accessibilité des regards et les conditions de lecture influencent directement la qualité du résultat. Fluotechnik accompagne les professionnels dans le choix du traceur, du dosage et des équipements nécessaires à leur intervention.

Solutions for wastewater and stormwater networks

Tracers can be used to inspect connections, collectors, manholes, downpipes and drainage networks.

Several detection methods

Depending on field conditions, tracer recovery may be observed directly or detected under UV light.

Support for understanding the network

Tracing helps reconstruct the route of a network when plans are missing, incomplete or uncertain.

Several colours for comparing branches

Different tracers can help distinguish between several injection points or flow paths.

A complete range of equipment

Dyes, kits, UV lamps, pipe plugs, smoke generators and accessories make it possible to adapt the protocol to the constraints of the operation.

Expert technical support

Our team helps you determine the type of tracer, the required quantity and the detection equipment to use.

FAQ about pipe tracing and sewerage

Why trace a sewer pipe?

Tracing can be used to follow a flow, verify a connection, identify where a pipe leads or distinguish between several networks when their layout is uncertain.

How can you check whether a pipe leads to the wastewater or stormwater network?

A tracer can be introduced into the relevant drain and then searched for in accessible manholes, collectors or outlets. The point where it reappears helps identify the network to which the pipe is connected.

Which dye should be used to trace a pipe?

The choice depends on:

The water volume
The flow rate
The distance
The expected dilution
The visibility of the control points
The available detection method

A visible dye is often suitable for direct observation. A fluorescent tracer may be more appropriate when the signal is weak or difficult to identify.

Can several colours be used at the same time?

Yes. Several tracers can be used to distinguish between connections or injection points. Their colours or fluorescent signatures must be sufficiently different, and the protocol should minimise the risk of mixing or confusion.

Is a UV lamp required?

No. It is only necessary when the selected product must be detected under UV light. A visible dye can be observed without specific equipment when conditions allow.

How long does it take for the tracer to appear?

The time depends on:

The length of the pipe
Its gradient and diameter
The flow rate; the water volume
Any areas of retention
The layout of the network

A short pipe with a steady flow will generally produce faster tracer recovery than a long network with stagnant areas.

Can tracing locate an underground pipe?

Tracing is mainly used to confirm the movement of water between several accessible points and identify where a pipe leads. It does not necessarily provide the exact geographical position of the entire underground pipe without another locating method.

Can a blocked pipe be traced?

Tracing may reveal absent, delayed or reduced tracer recovery. However, it does not replace specific methods for locating and clearing a blockage. The result depends on the severity of the obstruction and the amount of flow that remains possible within the pipe.

Is the tracer compatible with all materials?

Compatibility must be checked according to the product, pipe materials, seals, fluids present and conditions of use. The technical information associated with the selected product should always be consulted.

Can a tracer be used to inspect several connections?

Yes, provided that the injections and observations are organised in a way that makes the results easy to distinguish. Several colours may be used, or the tests can be carried out one after another to avoid confusion.

Customer reviews of our sewer tracing solutions

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They use our tracers to inspect their drainage networks

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They use our tracers to inspect their drainage networks

Nous utilisons régulièrement les produits FLUOTECHNIK pour nos recherches de fuite et en sommes très satisfaits. Les couleurs sont vives, bien visibles à l’œil nu et en photo. Les kits sont pratiques, complets et adaptés à toutes les situations. Un vrai plus en efficacité sur le terrain. Bravo à l’équipe FLUOTECHNIK !

Loïc ANDRE

Provence Solutions

Spécialiste des fuites, j’utilise les traceurs UV de Monsieur Paillet pour leur fiabilité et discrétion. Invisibles à l’œil nu mais nets sous UV, ils sont idéaux en milieu sensible. Les traceurs colorés permettent de différencier les réseaux. Les ballons obturateurs complètent bien l’ensemble. Monsieur Paillet se montre toujours disponible et de bon conseil.

Fabien DISCHINGER

Détecte Fuite Sàrl

Grâce au Pack Pro UV de Fluotechnik, mes diagnostics de fuites sont plus rapides et précis. Le coffret est complet, avec des traceurs colorés et incolores, deux lampes UV puissantes, et une valise solide très pratique sur le terrain. Le dosage des traceurs est simple et précis, ce qui me fait gagner un temps précieux. Je recommande vivement ce kit aux pros du bâtiment et de l'étanchéité.

Gilian BOUBRHI

Gsm Fuite

Choosing a solution for pipe tracing and sewerage

Tracing provides a practical way to understand the layout of a sewer network, verify connections and follow water movement between several accessible points.

It can be used in:

Wastewater networks
Stormwater networks
Combined sewer systems
Private connections; collectors
Manholes
Downpipes
Basins
Outlets
Various drainage structures

The choice of solution mainly depends on:

The type of network
The purpose of the inspection
The length, gradient and diameter of the pipes
The flow rate and water volume
The expected dilution
The number of points to monitor
The visibility of the tracer recovery areas
The detection method: direct observation or UV detection
The number of connections to distinguish
The complementary equipment required.

For a simple check between two manholes, a visible dye may be sufficient. When tracer recovery is highly diluted, difficult to see or located in an inaccessible area, a fluorescent tracer used with a UV lamp can improve detection. Complete kits are suitable for professionals who need the products, dosing accessories and detection equipment required for regular operations in a single package. Fluotechnik helps you prepare a method suited to the network, field conditions and the result you are seeking.

Complete your equipment for inspecting sewer networks

Visible dye, fluorescent tracer, complete kit or complementary equipment: discover Fluotechnik solutions that allow you to adapt your method to the network, the expected tracer recovery and the observation conditions.