I should have tested this filter before going on the trip, but our first night we hung the bag to get some water and it took us an hour to get it to start barely dripping out. We made sure there were no air bubbles, pushed water through on both sides to flush it, and to no avail. For the next 7 days we managed to get the fastest rate of about a liter every half hour. Luckily, I had a steriPen for a backup. Our water sources were spring fed creek and rivers here in Alaska so sediment was not the issue. Now that I'm back home I'm testing it in the kitchen and it barely works. Unfortunately this must be a faulty product, and it was my fault that I didn't test this before I left so I could have left it behind.
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