Schematic representation of a Katadyn Pocket filter. <b>Legend:</b> (A) Pump handle, (B) Output hose, (C) Input barb, (D) Check valve, (E) Ceramic filter element
<a href="//commons.wikimedia.org/wiki/User:Sputniktilt" title="User:Sputniktilt">Sputniktilt</a>
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<span class="int-own-work" lang="en">Own work</span>