Questions and answers

We’ve collected the most frequently asked questions about water filtration with i3 Point-of-Care filters and their answers for you here:

  • Water filters by i3 Membrane have a lifespan of 40 days. Within this period, they can be used safely and without limitations. Bacterial retention, the bacteriostatic action of the filter surface and an adequate flow rate are ensured throughout the filters' usage life.

  • When i3 Membrane's water filters are used for longer than the specified 40 days, we do not guarantee the function and efficacy of our products.

  • The filters have a validated shelf or storage life of 5 years. The expiry date is marked on the product packaging and labeled with an hour-glass symbol.

  • i3's filters for medical water filtration are single-use products. They can be discarded with the household trash after they have been used. When removing the filter, follow the instruction for use.

  • The i3 ZERO and i3 ZERO connect Point-of-Care filters are attached to the water faucet or the shower hose using a quick-release fastening. i3 ZERO direct has a standard screw thread that allows it to be attached directly to the shower hose. Please see the following instructions for use for the exact installation and removal procedures: i3 ZERO instruction for use, i3 ZERO connect instruction for use, i3 ZERO direct instruction for use.

  • The high performance flat membranes used in i3's water filters are designed so that the flow rate is adequate even when the water quality is low. However, if very large amounts of particulate matter (e.g. rust, silica) are present in the drinking water, the flow rate may be reduced, and the membrane's lifespan may be shortened as a result.

  • If you are ordering from us for the first time, we need a written order (e.g. by e-mail to as well as the name of your company. Please also include your billing address, delivery address and the name and telephone number of the person to be contacted in case of any questions.

    As a returning customer, you can order by e-mail or phone. In this case, all we need for verification is your customer number.

  • Yes, the surface of i3 Membrane's Point-of-Use water filters can be disinfected by wiping. This means you can include the filters in your daily cleaning and disinfection routine.

  • i3 Membrane's Point-of-Use water filters consist of a microfiltration membrane with a pore size of 0.2 µm, which show to have a validated microbial retention rate equivalent to LRV > 7 log per cm2 (Brevundimonas diminuta) according to ASTM F838.

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Simply send us a message or give us your contact details. Our experts will get in touch with you to answer your questions.

i3 Membrane GmbH
Theodorstraße 41 P
22761 Hamburg
i3 Membrane Corporation
13801 Reese Blvd West. Ste 310
Huntersville, NC. 28078