I bought this water filter to take to the high peaks on a 5 day backpacking trip. I went with two other guys and they were going to use tablets to purify their water. After seeing and tasting the water that I was pumping, I ended up pumping water for all three of us every morning and evening. The streams were extremely clear so the threat of the filter getting a large silt build up was not there. I couldn't be happier, I backwashed once. The pumping is so light that I carried everyday in my daypack. The only negative is that it did get a little harder to pump on about day 4. I did backwash with no problems. Great pump, I recommend highly!
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