I can't speak for the Berkefeld but I can recommend some <br>things over at Pure Water Products.<br><br>They have a lot of information available. <br><br>Check them out at http://www.pwgazette.com/pwp.htm , in addition <br>take a look at what they have for emergencies (http://www.pwgazette.com/gravity.htm). <br>This is a pretty neat, low-tech solution. Even without their products, you can <br>build/design something yourself that does the same thing.<br><br>I speak about them as a customer and have no other relationship.<br><br>rockbyte