It appears the url you posted in the original post is not their current set of pages, I tried to contact them via the link and it was for naught, so i did a gobbble goober search and found their newer set of pages
Sawyer
that said I agree with Texican, the claims they make are as misleading as you can get, thoguh if you read their statements thoroughly, you find that they say
Quote:
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Backwashing is not required often unless you are filtering very turbid water.
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Which is What Texican was talking about with glacial silt! Their million gallon claim may be true, no one more than likely is gonna actually filter through that much and call them on it if it doesnt reach exactly a million gallons before wearing out, and under ideal laboratory conditions the filter may indeed go that far, actual field use will vary and they can walk away from any lawsuit using similar terminology and verbiage....
It is an inexpensive filtration system compared to others, and appears to have a wide range of appeal, and they even try to persuade you with adding the CDC link on their page like they have some sort of seal of approval! [at least i could not find anywhere the CDC says they use Sawyer products, but i may have missed that] It is also lightweight for being able to filter over 500 gallons per day [probably near clean and non-turbid water already] so it may be a decent choice for some groups or multiple family retreats and camp ventures..... until i tryed it i wont knock it off the list of possibles. and at the price it could be great for a MAG to get and store a few [after trying one out].
My backpacking filter system i bought years ago and added filter replacements tol ast me awhile is a Sweetwater which i believe sold to
MSR, and they changed the look of the product to appeal to more people, but the replacements for my unit are the same and still available after over 15 years, though no longer in the color i have some in... If i find a stream that is not silty i can get plenty of water out of my filter before cleaning it too.
It all depends upon what you are after the filter to do for you as to what type of system you need look into, a Reverse Osmosis filter is awesome, but you get like 3 gallons a day from one in line on your water coming into your house.... though there may be a gravity feed set up available too somewhere, they tend to be spendy and also need upkeeping.
William
Idaho