Protect the engine from what the fuel may contain.
H2O-Stop creates a technical barrier during refueling, helping to separate free water and impurities before they reach the fuel system.
Preventive protection
How much can dirty fuel cost you?
The cost of preventive protection is often much lower than the potential cost of extraordinary maintenance.
These values are indicative estimates for educational purposes. Fuel system damage depends on multiple factors. H2O-Stop is a preventative protection, not a guarantee of problem absence.
Preventive comparison
Every refuelling can bring in more than just fuel.
Free water, impurities, and sediments can enter the tank during every refueling — without you being able to see them. H2O-Stop creates a technical barrier before they reach the engine.
Real demonstration — H2O-Stop in action
Free water in gasoline - real test
Actual trial
Water is only visible when it's not flowing into the tank.
During refueling, H2O-Stop intercepts free water and impurities before they reach the fuel. The proof is in the filter material, not in the engine.
What remains in the filter is what doesn't end up in the tank.
Results may vary depending on fuel quality, water content, correct installation, and version used.
What's up
A filter barrier at the point where the fuel enters.
H2O-Stop is an installable or portable protection device that works during refueling. It is positioned in the neck of the tank or in the filler opening and helps retain free water and impurities before they enter the fuel system.
- Used during refueling
- Works before fuel enters the tank
- Helps retain free water and impurities
- It can be either fixed or portable, depending on the application
- It does not replace filters downstream of the fuel system
H2O-Stop protects at the tank inlet. Compatibility and version type must be checked based on the vehicle and use.
Tank inlet protection
H2O-Stop Technology
Technical structure designed to protect.
3-layer TNT, free water separation, impurity filtration. Designed and manufactured in Italy.
Technical non-woven fabric with triple functional layering for separation and filtration.
The material retains free water before it can reach the tank.
Filtration of impurities down to approximately 12 microns where validated for the specific version.
Do not wash or regenerate. Replace in case of damage, significant contamination, or end of life.
Designed and manufactured entirely in Italy with selected materials.
Two H2O-Stop solutions
Choose the version most suitable for your use.
Installable for permanent protection. Portable for on-the-go protection.
H2O-Stop Installable
Designed to be inserted into the filler neck of compatible models, it protects the fuel system at every refill.
H2O-Stop Portable
The practical solution for filtering fuel during refueling, ideal when fuel quality is uncertain.
Installation — compatible models
Simple on compatible models. Always with correct verification.
H2O-Stop fits into the filler neck of compatible models. Always check the make, model, year, and diameter before installation.
Prior to use — verify
Always check compatibility, model, and year.
The filter must not be forced, cut, washed, or modified.
The expansion guide, if present, is only temporary and must be removed after installation.
Find the correct H2O-Stop for your motorcycle.
Compatibility depends on make, model, year, tank configuration, and product version. Always verify before purchasing.
Frequently Asked Questions
Direct answers on H2O-Stop.
Can't find the answer? Contact PurMotors support.
Contact supportDoes H2O-Stop remove all water from fuel?
No. H2O-Stop separates free water, but it cannot separate water that is chemically mixed with the fuel.
Is H2O-Stop an additive?
No. It does not chemically modify gasoline. It is a mechanical filtration and separation system that operates during refueling.
Can I wash it or regenerate it?
No. H2O-Stop must not be washed, regenerated, treated with solvents, or turned upside down. Only periodic visual inspection is required.
When should it be replaced?
It must be replaced in the event of visible damage, deformation, significant contamination, persistent abnormal flow, or product end-of-life.
Is it compatible with all motorcycles?
No. Compatibility must be verified using the product data sheet, application list, or PurMotors compatibility search. Do not install without verifying make, model, and year.