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Legionella, pseudomonads or turbidity

We clean your pipes
and water-bearing systems
inside buildings

Welcome to comprex® Building

Clean pipes and water-bearing systems thanks to comprex®

We differentiate between functional (heating and extinguishing system) and hygienic (drinking water installation) water systems.

Deposits impair the functionality and performance of heating and extinguishing systems.
In drinking water installations, turbidity and contamination affect the quality of the drinking water.

With comprex® we create clean conditions in new and existing systems.

Adjusting the thermostat on a radiator valve in drinking water systems.

Functional water systems

Deposits can be corrosion products, limescale and dirt. They influence the flow and pressure in extinguishing systems and also the heat transfer in heating systems. The function of the fittings is no longer guaranteed.

comprex® removes these deposits and restores the function of your system.

Safe heating and fire extinguishing systems thanks to comprex®.

A child filling a glass with water from a kitchen faucet, part of the regular cleaning of drinking water systems.

Drinking water installation

Deposits are the cause of turbidity and biofilms are responsible for microbial contamination. Both influence the quality of drinking water.

comprex® removes unwanted deposits and biofilms, including legionella and pseudomonads.

comprex® restores the perfect hygienic condition of cold water pipes, hot water pipes and circulation pipes.

Typical areas of application for comprex®

Cleaning of drinking water plants

Hospitals & Clinics

Kitas, Schools & Universities

Senior centers & nursing homes

Residential, Office & Commercial

Swimming pools & gyms

City Halls & Town Halls

The comprex® process mobilizes and removes deposits and biofilms from your building pipes. The combination of air and water cleans effectively and gently at the same time.

The solution for contamination in water pipes

We help with comprex®

With comprex®, we have the solution for a wide range of contamination and cleaning requirements for water pipes inside buildings. Our customers confirm these successes in practice time and time again.

Read on our website how comprex® can restore the function of heating systems or fire extinguishing systems or, in the case of drinking water installations such as problems with legionella and turbidity, the hygienically perfect condition.

For new systems, the comprex® impulse flushing process helps to remove assembly-related auxiliary materials, foreign matter and impurities.

Functional water systems

Heating systems

Deposits in heating circuits and heating systems significantly reduce the flow rate and heat transfer. They cause considerable operating problems in the long term. With comprex® we provide a remedy.

Extinguishing systems

Functioning extinguishing systems are an essential part of fire protection.
Deposits can impair the function. With comprex® we create security.

Drinking water installation


Legionella bacteria are ubiquitous in freshwater and can multiply in water-bearing systems. In the event of improper operation, for example due to deposits in the circulation pipe, increased concentrations can occur in drinking water installations. Then quick action is required. This is because legionella poses a serious health risk. The rod-shaped bacteria live in water and can cause the infectious disease legionellosis through droplet transmission.


Microbiological contamination can occur in drinking water pipes. The causes are structural, operational or procedural deficiencies. Pseudomonads, especially Pseudomonas aeruginosa are rod-shaped bacteria. They can be dangerous for people with weakened immune systems. They are a dreaded hospital germ with antibiotic resistance. Therefore, quick action is required in the event of contamination.


The cause of turbidity in drinking water installations is usually corrosion, especially in old steel pipes. This is usually noticeable by a reddish-brown discoloration of the drinking water. Corrosion products can clog filters, strainers, aerators or angle valves. In addition, the cross-section of old steel circulation pipes is decreasing. This reduces the flow rate.

New installations

Before commissioning the drinking water system, the tightness and hygienic condition must be ensured. With COMPREX® we can thoroughly clean your drinking water system before putting it into operation.

The comprex® GmbH

Competence center for your drinking water installation

Years of company history
Years of TI experience
Technical units

The focus and heart of our business is our patented COMPREX® impulse rinsing process, which we are constantly redefining and expanding at various performance levels. This allows us to adapt it perfectly to the individual, changing tasks of our customers.


We regularly report on new developments and innovations.
Find out more about our successful comprex® applications.

Practical examples

BuildingHeating circuit

Heating circuit shopping center

Cleaning the pipes of a heating system in a shopping center.
Learn more
LegionellaPractical example

Legionella in a curative education center

The cleaning of the drinking water installation after contamination with legionella bacteria
Learn more
LegionellaPractical example

Legionella and pseudomonads in a children’s hospital

Cleaning of the drinking water installation is carried out due to contamination with legionella and pseudomonads.
Learn more
Practical exampleTurbidity

Opacity problems in a special school

Hot and cold water line cleaning is required due to turbidity problems at a special education school
Learn more
New installationsPractical example

Cleaning of new plants with comprex®

The prerequisite for the commissioning of the drinking water installation are tightness and hygienic condition
Learn more
LegionellaPractical example

Legionella in an indoor swimming pool

The cleaning and disinfection of the cold water installation after contamination with Legionella bacteria.
Learn more

Professional articles and publications

LegionellaProfessional article

More technical articles – Building

Here you can see more technical articles about "Buildings - Drinking water installations".

Developed and patented

Comprex® cleaning process

The advantages at a glance

comprex® for cleaning drinking water systems

Our working basis

Rules and regulations

As experts in the cleaning of drinking water installations, we strictly adhere to the requirements of the German Drinking Water Ordinance and the specifications of the German Gas and Water Association.


As an industrial partner, we have participated in the two BMBF joint projects “Biofilms in Drinking Water Installations” and “Biofilm Management”, among others.
Read the results here.

Thesis Paper "Biofilms in Drinking Water Installations Download PDF
Thesis paper "Biofilm management Download PDF

Expert opinion

The effectiveness of our COMPREX® process has been tested and confirmed by the Institute for Hygiene and Public Health of the University of Bonn. Read the expert opinions here.

comprex® against biofilms Download PDF
comprex® in combination with disinfection against biofilms Download PDF

What information you can have ready with your request

Good preparation

What kind of building

Background information, facts and figures about the building help us to understand the situation and provide you with targeted advice.

Number of taps

The number of taps gives us an initial estimate of the time required for comprex® cleaning of the drinking water system.

Pipeline material

The material of the drinking water system also plays an important role in the further procedure.

Place of sampling

This information helps to further isolate the cause of the problem and to initiate targeted measures.

A clean result in just a few steps

Our approach


Individual advice

Based on your inquiry, our hygiene experts first discuss the individual task with you and clarify the general conditions. In preparation for the site visit, we ask for building plans in preparation for the site visit.


On-site meeting and preliminary planning

The basis for a successful cleaning measure is sound preliminary planning. On site, we identify necessary conversion measures and discuss the implementation of the project with you.


Schedule and offer

Depending on your needs, we schedule cleaning on weekdays, weekends, during the day or at night. Based on the preliminary planning, our experts work out the detailed schedule and prepare an offer and for the cleaning measures.


Start cleaning

We come to you on schedule with our comprex® technology. We prepare your drinking water installation for cleaning and connect our technology. Based on the schedule, we clean your drinking water installation section by section – one after the other cold water, hot water as well as circulation water pipes.


Removal of microbial contamination

The comprex® unit generates controlled pulses with multi-filtered compressed air. Fed into the cleaning section, these pulses generate highly accelerated air and water blocks and enormous turbulence with strong shear and drag forces. These mobilize biofilms and deposits and reliably remove them.

With comprex® , we nevertheless clean gently and always remain below the permissible system pressure.


Bleeding the system

As soon as no more turbidity is visible at the sampling points, we deaerate the cleaned strand. The cleaning of this section is completed.


Optional: disinfection

At the customer’s request, we can also carry out chemical disinfection in accordance with DVGW W 557 after thorough cleaning of the pipeline. We use hydrogen peroxide or chlorine dioxide for this purpose.



After completion of the cleaning and, if necessary, disinfection measures, sampling must be carried out. Care must be taken to ensure that the water does not stagnate in the pipeline. As soon as the result of the sampling is available and faultless, the drinking water installation can be put back into operation.

We are at work for you

Our technicians

We are flexible, personal and discreet for you in use. With our many years of experience we can
pre-plan complex cleaning tasks thanks to the sophisticated comprex® technology and process them on site in a targeted manner.

Customized application technology

Our equipment

We operate across a wide range of industries and specialize in versatile cleaning applications. Find out here how our customized application technology can successfully and efficiently clean the many systems.

CU - 3300

Areas of application

– Drinking water installations
– Municipal water networks
– Industrial systems


Areas of application

– Drinking water installations

MDM mobile disinfection module

Areas of application

– Drinking water installations

Successfully performed comprex® cleanings

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Operations per year

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Thank you for your interest in our comprex® process.