> Water enters the filter through a graded density pre-filter, a special blend
> of materials which acquire a positive molecular charge in a moving stream of
> water....
>
Gee.  And I thought my drinking water system was complex:  I drive my
pickup a mile and a half over the ridge behind me here and fill a couple
7 gallon jugs from a spring that comes right out of an unfrequented
upper side of the mountain in a quiet corner of a state park.  No farms
or human dwellings are located nearby.  Some kindly person arranged a
short piece of PVC pipe among the rocks to serve as a spigot, and placed
a rock beneath it to serve as a convenient resting place for one's
jugs.  Folks come to this perpetual spring from as far away as the
little town in the valley on the other side of the mountain a few miles
away (located at the confluence of two small, relatively clean rivers).

Except for a grain of sand or two that settle to the bottom of the jug,
the water is crystal clear in glass and has nothing that I'd call a
"taste", except that it tastes like water (My treated well water is
spitable).  A $5 pool test kit shows a perfect 7.0 pH; a simple, free
bacterial test at the state dept. of conservation office in town showed
a touch of coliform, as to be expected from any water that runs out of
or onto the ground.  So I boil it 6 minutes (in glass), let it cool,
pour it into a crock with a spigot and, voila!, 14 gallons of
mountain-filtered, mineral-rich water for the mere cost of about twenty
minutes of my time and 3 miles wear and tear on my truck.  What more
could a cave person ask for?  I feel lucky!

Lois