Why install an anti-Legionella filter?
Legionellosis is a serious respiratory disease caused by the bacterium Legionella pneumophila, which develops in warm water systems.
Healthcare facilities, hotels, residences, public buildings, and industrial sites are particularly at risk.
Installing an anti-Legionella filter provides immediate protection for users against the presence of bacteria in the water.
It is a complementary solution to thermal or chemical treatments, ideal in the event of a temporary contamination or as reinforced prevention.
What is an anti-Legionella filter?
An anti-Legionella filter is a microfiltration device that retains bacteria, including Legionella, thanks to an ultra-fine filtering membrane (≤ 0.2 µm).
Installed at the end of the water line — on a tap, shower, or specific water outlet — it ensures water free from microorganisms at the point of use.
This system is 100% physical, with no added chemicals, and is suitable for hospitals, public buildings, hotels, or laboratories.
The advantages of anti-Legionella filters
- Immediate protection for users
- Easy installation on existing water outlets
- Proven effectiveness against bacteria and particles
- Natural filtration without chemicals
- Backup solution in case of Legionella detection
At H2O ÉQUIPEMENT, we offer tested and certified filters compatible with most professional installations.
How to choose the right anti-Legionella filter?
The choice of filter depends on several criteria:
- Pore size ≤ 0.2 µm to block the Legionella bacterium
- Type of use: shower, tap, network outlet, collective sanitary area
- Filter lifespan (generally 1 to 3 months depending on model and usage)
- Nominal flow rate suited to user comfort
- Compatibility with existing connections
- Compliance with sanitary and microbiological certifications
Our experts can help you determine the filter best suited to your water network and technical environment.
Steps for installing an anti-Legionella filter
1. Preparing the water point
- Clean and disinfect the installation point (showerhead, tap, hose)
- Check for the absence of scale or biofilm
- Install a non-return valve if necessary
2. Mounting the filter
- Screw the filter in the direction of the indicated water flow
- Ensure proper sealing without over-tightening
- Check the correct positioning of the gaskets
3. Commissioning
- Let the water run for a few seconds to purge the system
- Check for leaks or abnormal pressure drops
- Record the installation date in the sanitary register
Maintaining your anti-Legionella filter
Regular maintenance ensures the reliability of the device. Here are best practices:
- Replace the filter every 1 to 4 months depending on the model and usage
- Regularly clean accessories: showerheads, hoses, aerators
- Perform microbiological analyses as required by regulations
- Record each intervention in a sanitary logbook
A saturated or neglected filter can become ineffective. H2O ÉQUIPEMENT offers a preventive maintenance program to ensure continuous protection.
Mistakes to avoid
- Delaying filter replacement
- Choosing a model that does not meet sanitary standards
- Neglecting secondary contamination points in the network
- Ignoring overall water quality and temperatures
H2O ÉQUIPEMENT support
As specialists in water treatment and Legionella prevention, we assist you throughout the process:
- Diagnosis of your installations
- Supply of certified anti-Legionella filters
- Installation by qualified technicians on request or remote training
- Scheduled follow-up and replacement
FAQ – Anti-Legionella Filters
What is an anti-Legionella filter?
An anti-Legionella filter is a microfiltration device that prevents the Legionella bacterium from passing into the water through a filtering membrane of 0.2 µm or less.
It is installed on showers or taps to ensure bacteria-free water at the point of use.
Why install an anti-Legionella filter?
Installing an anti-Legionella filter helps protect users against Legionellosis by preventing the bacterium from circulating in the water.
It is a complementary measure to thermal or chemical water treatments.
How do you maintain an anti-Legionella filter?
It is recommended to replace the filter every 1 to 4 months, clean accessories regularly (showerheads, hoses, aerators), and record each intervention in a sanitary logbook.
Regular microbiological monitoring is also mandatory.
Who can install an anti-Legionella filter?
Installation can be carried out by a water treatment professional such as H2O ÉQUIPEMENT, ensuring compliance, performance, and sanitary safety of the device.
