The 7 Best Portable Water Purifiers For Travel (Ultimate ...

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The 3-in-1 Water To Go filter uniquely employs three different technologies to remove virtually all types of contaminants from the water you&#;re filtering, including microbiological agents, hazardous chemicals and heavy metals.

The three technologies used are mechanical filtration, electro-adhesion and activated carbon, which is incorporated into the filter membrane.

As regards mechanical filtration, the filter uses a pore size of 0.7 microns, which isn&#;t very small compared to some other purifiers.

But this filter combines three different technologies to remove contaminants, so it doesn&#;t depend on having a miniscule pore size for its efficacy.

The filter seems to employ the same electro-adsorption principle that is used in the Aqua Pure Traveller filter to remove viruses, bacteria and protozoa from the water.

From the website:

&#;The 3-in-1 system in our filters was developed at the behest of NASA and they are constructed utilizing nano technology. Nano alumina along with activated carbon and other filtration ingredients are utilized to bring about this amazing new patented process. The nano alumina emits a positive charge when wet and attracts the negatively charged contaminants of protozoa, bacteria and virus.&#;

The activated carbon used in the Water To Go filter is not of the inefficient carbon block type, where up to 70% of the surface area is lost by the adhesives that are used to hold the block together.

Such carbon block filters also have a larger pore size that doesn&#;t remove harmful microbiological contaminants like viruses, bacteria and protozoa.

Instead of using a carbon block filter, Water-to-Go incorporates the activated carbon into the filter membrane for greater improvement of taste and greater odour reduction.

The 3-in-1 filter will remove 99.9% of all contaminants, including viruses like Hepatitis A and Polio, bacteria like Cholera and E.Coli, protozoa like Cryptosporidium and Giardia Lamblia, heavy metals like lead and mercury, hazardous chemicals like chlorine and fluoride, parasitic worms like tapeworm and threadworm, and microplastics.

There&#;s a longer list of the nasty stuff that the filter removes on the company&#;s website. They mention on this same page that the Water To Go filter will not remove Arsenic to 99, presumably meaning 99%.

The filter has been tested extensively in three different countries (UK, USA and India) and all have confirmed that the Water To Go filter removes more than 99.9% of contaminants in water.

In the UK the filter has been subjected to testing by The London School of Hygiene & Tropical Medicine. You can view the testing data for that here.

In the USA it has been tested by BSC laboratories in Gainesville, Florida and you can view the testing data for that here. 

wenesy Product Page

In India, Water To Go was tested by Bangalore Test House. You can view the results here. 

The filter that comes with the Water To Go bottle needs to be replaced after filtering 200 litres of water. You can normally buy a twin pack of replacement filters on Amazon for about $30.

Assuming you drink 2 litres of water from the bottle per day, it&#;s going to last you about 100 days or a little over 3 months, so you&#;ll need to bring a few replacement filters if you&#;re planning a longer trip.

Something that concerns us is that the filter doesn&#;t have a proper failsafe mechanism that shuts off the water flow when you surpass this limit, as do some of its rivals.

Instead, they&#;ve programmed just enough carbon into the 3-in-1 filter unit that it stops filtering odours and tastes after processing 200 litres of water.

The filter will continue to remove harmful microbiological contaminants for another 30-50 litres after you&#;ve passed the 200 litre mark, the idea being that before you exceed the lifespan you will have noticed a change in odour and taste in the water, which will prompt you to change the filter.   

But what if you&#;re travelling and constantly drinking from different water sources, and you&#;re not sure what the water &#;usually&#; tastes like when the carbon filter is working? This definitely concerns us.

However there is another way that you can know when to change the filter; if you have registered with Water To Go you will be then be sent a reminder that it&#;s time to change the filter after 3 months.

But then what if you aren&#;t using the bottle regularly during those 3 months?

Because of these imperfect solutions, feel that the best way for you to know when to change the filter will be for you to record your usage.

Like most filters, the Water to Go is not recommended for filtering juice, squash, cordial, sea water or (God forbid) urine, as other liquids will reduce the efficiency and lifespan of the filter (and seawater will probably destroy it).

The filter can withstand fridge-level temperatures but if it freezes the membrane will be damaged, its performance impaired, and the filter will need to be replaced ASAP.