i3 TWO sterile filter

Point-of-Use Legionella filter for the shower*

The i3 TWO Point-of-Use sterile filter is used in medical settings to prevent infections caused by bacteria such as Legionella pneumophila, Pseudomonas aeruginosa and mycobacteria. It is used as a shower head for the sterile filtration of piped water. The water filter is used in situations where aerosols are formed and protects immunocompromised and immunosuppressed patients receiving medical treatment in oncological, transplant and intensive care units, and also neonates, from infection due to waterborne pathogens.

i3 Membrane's Point-of-Use sterile filters are CE-marked Class 1 medical devices and fulfil all the requirements of the EU Medical Device Regulation (MDR).

*This content is not valid for the U.S. market.
For an overview of our products for the U.S. market,
please visit our U.S. website.

i3 TWO connect: Sterile filter for the shower with quick release connection

The TWO connect has a quick release connector which permits rapid and secure changes of filter on the shower hose. Information about the relevant quick release connection adapters is available here

i3 TWO direct: Sterile filter for the shower with screw thread connection

The i3 TWO direct has a standard screw thread (1/2") which allows it to be fitted on the shower hose without accessories.

i3 TWO connect: Sterile filter for the shower with quick release connection


  • Effective protection from retrograde contamination throughout the period of use due to the bacteriostatic properties of the filter housing

  • Stable flow rate throughout the 50 day period of use

  • CE-marked medical device whose intended purpose is to prevent infection

  • Clear product identification for a legally conform documentation of the filter change using the i3 trackApp or i3 change service

  • Biocompatibility in accordance with ISO 10993-1 thus ensures patient safety and product conformity

  • Quick and easy installation by means of quick-release fastening or screw thread

  • Reliable sterile filtration due to the use of a high performance flat membrane with nominal pore size of 0.2 μm

Technical data

Flow rate 15 L/min at 5 bar (inital)*
Bacterial retention > 7 log (Brev. dim.) per cm2 filter area
Protection from retrograde contamination > 4 log Pseudomonas aeruginosa, Escherichia coli, Staphylococcus aureus within 24 hours
Disinfection Cleaning with permitted disinfectants*
Operating pressure max 5 bar
Operating temperature 60 °C (max 70 °C for 30 mins.)
Duration of use 50 days (7 weeks)
Membrane i3 High performance flat membrane
Pore size of membrane 0.2 µm
Shelf life 5 years
Chlorine resistance Resistant to chemical shock disinfection*
Adaption i3 TWO connect: Quick-release coupling*
i3 TWO direct: 1/2“ screw threat 
Accessories Accessories for i3 sterile filter

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