Over a year on ours. Filter drinking water, coffee pot and humidifier water through it, water source is tap water. Bought it to have in case tap water source became contaminated. Boil water notices are common in our area (NE TN, SW VA). Average 3 gallons per day and still on the same set of filters.
The red dye test was pretty neat
. I wish the manufacturing of the components was on par for the price you pay though... Seems excessively overpriced and wish I would have bought the filters and put together the rest of the components myself.
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I would not trust them to filter a source that is known to be contaminated.
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I'm curious as to why you say this? Do you have lab data showing it to not filter specific sources of water? Someone you know get sick from using one? I have 3 Sawyer Minis for backup as well.