Sawyer® Water Filters use hollow fiber
membrane filters. The Submicron Hollow Fiber Membrane found in this filter
uses a cluster of micro-fibrous tubes. When the water is drawn through
the membrane it flows through the side walls of the microfibrous tubes
without any noticeable pressure drop. Pore sizes are so small that it
mechanically removes sediment, bacteria, protozoa, cysts, viruses and
other contaminants. This filter does not require the use of chemicals
such as iodine or chlorine. All Sawyer® Water filters exceed EPA
and NSF recommendations for removal rates.
Sawyer® water filters and purifers can be backwashed.
So let's say that you take your filter on a 3 month trip with you.
When you return from your trip, simply backwash your filter with clean
water to flush out all of the particulate that has built up in your
filter. It's that easy. So don't let clean water be an issue any more,
Buy a Sawyer® Water Filter or Purifier.
here for more info on Sawyer Filter and Field and Lab Reports