Plumbing and heating leak detection: tracing solutions for your systems

Q: How long should you wait before checking for the tracer?

The required time depends in particular on:The length of the circuitThe flow rate; the pressureThe fluid volumeThe size of the leakThe position of the injection pointThe operating conditionsSome recoveries may appear quickly, while others require a longer circulation period.

A leak in a concealed pipe, heating circuit or underfloor heating system can be difficult to locate without carrying out multiple invasive inspections. Tracing makes it possible to monitor water circulation, confirm flow between several points and better define the area in which further investigation should be carried out. Fluotechnik offers visible dyes, fluorescent tracers, kits and equipment for plumbers, heating engineers, leak detection specialists and maintenance professionals. These solutions can be used on pipes, fittings, radiators, boilers, manifolds, closed loops, underfloor heating systems and other hydraulic installations in buildings.

A minimally invasive diagnostic method

Check the route taken by water before opening a floor, wall or service enclosure.

Suitable for plumbing and heating systems

Work on water pipes, radiators, boilers, manifolds, closed loops and underfloor heating systems.

Visible or UV detection

Choose a directly visible dye or a fluorescent tracer revealed using a suitable lamp.

A more targeted search area

The appearance of the tracer can confirm a flow path, connection or likely recovery area.

Expert technical support

Fluotechnik helps you select the product and dosage according to the installation, fluid, circuit volume and detection method.

A minimally invasive diagnostic method

Check the route taken by water before opening a floor, wall or service enclosure.

Suitable for plumbing and heating systems

Work on water pipes, radiators, boilers, manifolds, closed loops and underfloor heating systems.

Visible or UV detection

Choose a directly visible dye or a fluorescent tracer revealed using a suitable lamp.

A more targeted search area

The appearance of the tracer can confirm a flow path, connection or likely recovery area.

Expert technical support

Fluotechnik helps you select the product and dosage according to the installation, fluid, circuit volume and detection method.

Our solutions for plumbing and heating leak detection

The choice depends on the circuit being inspected and the conditions in which the tracer can be detected. A visible dye may be suitable when the water or tracer recovery area remains directly accessible. It can help verify a connection, follow a network branch or confirm the presence of water in a specific area. When only a small quantity of tracer is likely to emerge, the area is dark or the colouring needs to remain discreet, a fluorescent tracer used with a UV lamp can make detection easier. For professionals who regularly carry out this type of operation, complete kits bring together the product, dosing accessories and detection equipment in a single set.

Fluotechnik offers several solutions for diagnosing hydraulic systems in buildings:

Visible tracing dyes
Fluorescent tracers
UV dyes that are colourless under natural light
Complete water tracing kits
UV lamps and detection accessories
Dosing and application equipment

How does tracing help detect leaks in plumbing and heating systems?

Tracing involves introducing an identifiable substance into a circuit, then monitoring its movement and inspecting the areas where it may reappear.

This method can help to:

Check that a pipe supplies a specific area
Confirm communication between two parts of a system
Identify a plumbing or heating branch
Follow fluid circulation through a loop
Detect tracer recovery in an accessible area
Reduce the scope of further investigation
Inspect an installation after a repair

In plumbing systems, tracing can be used on water supply networks, concealed pipes, connections, tanks and technical circuits using water.

In heating systems, it can support the inspection of:

Boilers
Radiators
Manifolds
Closed loops
Underfloor heating systems
Distribution circuits
Associated hydraulic equipment

Tracing does not replace other leak detection methods, but it provides additional information about the route taken by the fluid. It can therefore help the professional focus inspections on the most relevant areas before carrying out more invasive work. Depending on the conditions, detection can be performed visually using a visible dye or under UV light using a fluorescent tracer.

How do you use a tracer to detect a leak in a plumbing or heating system?

A tracing test should be prepared according to the type of installation, circuit volume, fluid present and accessible areas. Before any injection, it is essential to check the product’s compatibility with the materials, seals, temperature and operating conditions of the system.

Step 1 - Identify the circuit to be inspected

Begin by identifying the installation concerned:

Water supply system
Concealed pipe
Distribution network
Heating circuit
Radiator
Boiler
Manifold
Closed loop
Underfloor heating system
Technical hydraulic equipment

Volume, flow rate, pressure, temperature and accessibility directly influence the method to be used.

Step 2 - Define the purpose of the test

Tracing may be used to: confirm a connection;

Follow a branch of the system
Check circulation within a loop
Inspect an area after repair
Detect tracer recovery
Define a suspected area
Compare several circuits

A clearly defined objective makes it easier to select the tracer and organise the inspection.

Step 3 - Check product compatibility

The tracer must be suitable for:

The fluid present
The pipe materials
The seals
The equipment
The operating temperature
The pressure conditions
The planned cleaning or flushing method

This check is particularly important for heating circuits, where operating conditions may differ from those of a standard cold-water system.

Step 4 - Choose the detection method

A visible dye is suitable when tracer recovery can be observed directly and the colouring does not create a particular issue.

A fluorescent tracer may be more appropriate when:

Only a small quantity is likely to emerge
Significant dilution is expected
The inspection area is dark
The recovery is difficult to see
The colouring needs to remain discreet under natural light
Inspection under a UV lamp is possible.

Step 5 - Adjust the dosage to the circuit

The quantity of product depends in particular on:

The volume of fluid
The length of the system
The pipe diameter
The flow rate; the pressure
The expected dilution
The number of areas to inspect
The sensitivity of the detection method

An insufficient dosage may make tracer recovery difficult to detect. An excessive quantity does not necessarily improve the diagnosis and may make flushing or interpretation more difficult.

Step 6 - Introduce and circulate the tracer

The product is introduced at the point defined in the protocol and then circulated under conditions suited to the installation. The required circulation time depends on the volume, circuit length, flow rate and possible size of the leak.

Step 7 - Inspect accessible areas

Depending on the installation, the professional may inspect:

Fittings
Valves
Radiators
Manifolds
Areas around the boiler
Service enclosures
Floors
Walls
Ceilings
Technical shafts
Previously repaired areas

When a fluorescent product is used, a suitable UV lamp improves the visibility of weak traces.

Step 8 - Interpret the observations

The appearance of the tracer can confirm a flow path or recovery point and help target the next stage of the diagnosis.

However, the absence of tracer does not always rule out a leak. Several factors must be considered:

Circulation time
Dilution
Leak flow rate
Accessibility of the area
Thickness of the materials
The presence of coverings
The layout of the system

The results should therefore be considered alongside the other observations made on the installation.

Why choose Fluotechnik for plumbing and heating leak detection?

Selecting a tracer depends on many factors, including the type of circuit, fluid, materials, temperature, volume, dilution and detection method. Fluotechnik supports professionals in choosing a solution suited to their installation and working conditions.

A range suited to water systems

Dyes, UV tracers, kits and accessories meet different requirements for plumbing and heating installations.

Visible or fluorescent solutions

Professionals can choose direct observation or UV detection according to the expected tracer recovery and site constraints.

Support for limiting unnecessary investigations

Tracing provides a better understanding of fluid circulation and helps focus inspections on a more relevant area.

Suitable for many types of installation

Pipes, fittings, radiators, boilers, manifolds, technical loops and underfloor heating systems can all be assessed using an appropriate protocol.

Selection based on compatibility

The product must be chosen according to the fluid, materials, seals, temperature and operating conditions.

Expert technical support

Our team helps you select the tracer, dosage, detection equipment and accessories required for your operation.

Plumbing and heating leak detection in video

Discover how to prepare and carry out a tracing inspection on a pipe or heating circuit.

These videos provide a clearer understanding of:

Identifying the circuit
Choosing the dye or tracer
Checking compatibility
Calculating the dosage
Introducing the product
Allowing sufficient circulation time
Inspecting under natural or UV light
Interpreting tracer recovery
Checking the installation after repair.

Lire la vidéo

Lire la vidéo

FAQ about plumbing and heating leak detection

How does a dye help detect a water leak?

The dye circulates with the water through the system. Its appearance in an accessible area can confirm a flow path, tracer recovery or communication between several parts of the installation.

Can a tracer be used in a heating circuit?

Some tracers can be used in heating circuits, provided that their compatibility with the fluid, materials, seals, temperature and product recommendations has been checked.

Can a tracer help detect a leak in underfloor heating?

Tracing can help verify fluid circulation and reduce the area in which further investigation should be carried out. However, the level of accuracy depends on the layout of the loops, leak flow rate, circulation time, floor coverings and accessibility of the tracer recovery point.

What is the difference between a visible dye and a colourless UV tracer?

A visible dye can be observed directly with the naked eye. A UV tracer that is colourless or only slightly visible under natural light must be detected using a suitable ultraviolet lamp. It provides a more discreet method of detection.

Is a UV lamp always required?

No. It is only required when detection relies on a fluorescent signal under UV light. A directly visible dye can be observed without a specific lamp when conditions allow.

Can tracing locate a leak precisely?

It can confirm fluid circulation, identify tracer recovery or reduce the search area. The accuracy depends on the layout of the system, dilution, size of the leak, accessibility and the protocol used.

How long should you wait before checking for the tracer?

The required time depends in particular on:

Some recoveries may appear quickly, while others require a longer circulation period.

Which product should be used for a concealed pipe?

The choice depends on the system, the fluid, the area that can be inspected and the required level of discretion. A visible dye, fluorescent tracer or complete kit may be considered according to the site conditions.

Can the same product be used for plumbing and heating systems?

Not necessarily. Temperatures, fluids, materials and operating conditions may differ. Compatibility must be checked separately for each type of installation.

Can the tracer damage the circuit?

A suitable product used in accordance with its recommendations should never be selected without checking compatibility. Its suitability for the materials, seals, equipment and fluids must be confirmed before use.

Does tracing replace other leak detection methods?

No. It is a diagnostic aid and can be combined with other methods according to the layout of the installation and the nature of the leak.

Customer reviews of our plumbing and heating solutions

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Customer reviews of our plumbing and heating solutions

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They use our tracers to target their leak detection operations more accurately

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 leak detection solution for plumbing and heating systems

Leak detection in a plumbing or heating installation does not rely on a single method. The choice of tracer depends on the system, fluid, circuit volume and the conditions in which tracer recovery can be observed.

Tracing can be used on:

A water supply pipe
A concealed network
A connection
A boiler
A radiator
A manifold
A heating loop
An underfloor heating system
A technical hydraulic installation

The choice of solution mainly depends on:

The objective: checking a connection, following a flow path, detecting tracer recovery or defining an area
The fluid in circulation
The materials and seals
The temperature and pressure
The circuit volume
The flow rate and expected dilution
The type of tracer: visible, fluorescent or colourless under UV
The available detection method
The accessibility of the areas to inspect
The required level of equipment