Katadyn Siphon Filter
Ked - Central America (Monday, March 07, 2011)
Works great if you know how to use it. I live in an area with Amoebic cysts which are harder to filter than the also abundant bacteria. It makes 10 gal. a day if the water is clean and 5 gal. a day if it is particulate dirty. If your water is really dirty, let it settle a day or so, then decant before filtering... or clean the filter half way through your 5 gal. Replace the tube with a longer 1/4 inch vinyl plastic tube and suspend your tank-with-filter from the ceiling... more altitude than this does not improve the filtering but getting it up a bit really helps. Larger diameter tubes will not pass bubbles. Clean the filter under running water (or under water) with Very light circular strokes with a used soft toothbrush... if you use the scrubby pad that comes with the unit, or even moderate tooth-brushing, your filter will be rapidly worn away. The ceramic elements are rather fragile and will sometimes crack, so be gentle and have some epoxy handy to coat any little cracks near the ends. Suck hard on the filter while it is in its reservoir to remove any bubbles... bounce it around lightly while sucking, then lay it on its side for filtering. After extensive review, i went with this and am on my third unit in 8 years, often providing drinking water for workers. With my careful brushing, i may get perhaps 2000 gal. out of one. Make sure to dry the filter thoroughly before storage! The first half-liter from a dry filter will taste terrible (resin?) even after many uses. Note that this unit does not work for viruses or chemicals... not a problem here unless your source is really polluted.