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Don't believe everything you read when looking at the advertising a filter publishes. .01 microns is enough to filter out any type of bacteria or protazoa including the notoriously difficult cryptosporidia (forgive any lapses in spelling - I'm going off memory and not doing my typical double-check of facts).matt gilbert wrote:...filters down to .01 microns. It claims to take everything (including viruses) out of the water...
This one has FDA approval to back the claims that it takes viruses out. Its not a ceramic or other traditional filter they refer to it as a matrix of some kind, its actually osmosis as best as I can figure. I'm pretty confident of the FDA approval , the first need I have is the civilian edition of the same one they issue to NATO troops. They guarantee you can drink safely from the dirtiest rivers in africa. I'm not saying they have my full confidence but I've drank from some pretty foul water sources and never had a problem. Its the weight of the thing that gets me. I want to find a lighter one but I don't want to have to use chemicals before I pump, it just seems to defeat the purpose. The other thing I like about the filter is its completley cleanable in the field. All you have to do is turn the cartridge upside down and pump clean water through it. Theoretically one filter is good for the life of the pump. The only thing that can damage it is a fall in which the filter cartridge gets the brunt of the force.olesma wrote:Don't believe everything you read when looking at the advertising a filter publishes.
I use MSR Miniworks EX filter. Light, and easy to clean in the field.matt gilbert wrote:I use a first need water purifier. It weighs around 18 ounces but filters down to .01 microns. It claims to take everything (including viruses) out of the water and I haven't had a problem yet. It costs around 80 bucks. I have also used iodine tablets and bleach, personally I like the purifiers (not just filters) better.
I would like to upgrade to a unit thats lighter and has a higher flow rate. Of course I want to retain the purifying aspect of the unit, any suggestions?
Matt,matt gilbert wrote:Since posting this topic I have had a pretty drastic change of heart about the filter/purifier I use. After reading a little bit about filters vs purifiers, I completely gave up on the idea of needed to purify water. Viruses in water are rare (especially in the US), and purifiers are too heavy or take too long (four hours for crypto with chemicals).
I now use the MSR sweetwater. I chose this unit over the miniworks for two reasons. First and foremost was the weight. The second was the durability of the cartridge in the MW. The ceramic filter (while more cleanable) is very fragile. I have seen them break after dropping the filter from chest hieght onto a carpeted floor. In my opinion the greater flow rate on the MW was negligible (an extra .1 liters per minute).
I still think the MW is a good unit, it just doesn't quite suit my needs. Overall I think that MSR makes the best filters if only because they are all field cleanable.