The ultrafilter eliminates up to 99.9% of waterborne pathogens and can filter any fresh water source.

The filter has two stages of filtration:

Stage : It uses carbon fiber, which is a super quick and efficient adsorption material. It strongly removes any unpleasant odors and tastes in water.

In contrast, most water filters only use activated carbon blocks or granulated activated carbon as a filter medium. However, once all of the adsorption points are filled, contaminated water can be released.

There are no carbon fines found in the WaterWell carbon fiber filter so secondary contamination is eliminated.​

Stage 2: The 0.1-micron ultrafiltration membrane (hollow fiber) is a highly efficient method of filtration and requires no chemicals. it’s 99.9% effective against bacteria protozoa and cysts (the average size of bacteria is 0.5micron)

It should be soaked first before using to maximize its efficiency and lifespan.

For first time usage, simply rinse the filter and bottle with clean water and stand the filter upright in water for 1 minute keeping the top 1cm dry.

The filter flow rate will be slow at first but as the water penetrates the filter's fibers, the flow rate will improve.

Please clean the filter and bottle as regularly as you would a normal bottle when you have access to clean water.

Or after a trip away and when you have access to clean water - please run clean water forcefully through the filter in reverse flow to drinking then shake it to dislodge any particulates and fully dry the filter before storing away.

If you have the latest version of WaterWell the filter can be cleaned by using the backflush device included. Fill the device with clean water and then dispense the water through the tip of the filter in reverse flow to drinking 2-3 times.

And finally if your trip is for an extended period of time.  Suck some water through the filter and regularly blow back through the filter to clean the filter and prevent clogging.

During the first several 100ml's you may experience some aftertaste this is quite normal and is derived from the carbon fibre. This should increasingly dissipate upon the first day of use.

In addition we recommend holding it under the tap and running water through it, or sucking some water up and then spitting it out. Any aftertaste  should disappear soon after.

Also please note It should be soaked first before using to maximise its efficiency and lifespan, this will also help any aftertaste upon first use to dissipate. For first time usage, simply rinse the filter and bottle with clean water and stand the filter upright in water for a few minutes.

WaterWell filters remove 99% of chlorine for 500 litres of tap water however they do not remove fluoride- the only way to remove fluoride from water is to use reverse-osmosis, activated alumina or ion exchange. Please be careful if you purchase filters that employ these last two methods.

Filters using low grade powdered activated alumina have the potential to leach aluminium into your drinking water and domestic ion exchange filters have a low retention rate and could release high concentrations of fluoride un-expectantly into your output water.

WaterWell protects against bacteria, parasites and cysts but does not filter out viruses the same is true for other filters based on particle filtration. Our filters remove all particles to a size of 0.1 microns - bacterial cells are typically 0.5 microns in size however viruses are one one-hundredth the size of the average bacterium. 

If you’re worried that there could be a viral risk where you’re going we would advise to use with water that has been purified using reverse osmosis, chemicals, boiling or UV  purified water and use WaterWell as a secondary filter. It’s important to note that some of these aforementioned methods do not remove sediment and particulates in the water.

Be sure to find out any possible viruses common in the regions  you are visiting, and make sure you are up to date on your immunisations and follow the usage and maintenance instructions provided with the bottle and filter.  

Yes WaterWell filters all particles at 0.1 microns and above. EFSA defines microplastic as particles ranging in size from 0.1 micrometers (microns) to 5 millimeters.