Eddie G wrote:
Gary Slusser wrote:

To my knowledge, there is no provision on any softener to mix hard
water with softened water. You would have to do so in the plumbing. I
do not suggest doing this.

Ion exchange does not sequester, it removes the positive charged ions
in the water with negative charged sites on the resin beads. As those
ions are removed, two much smaller and weaker positive charged sodium
or potassium ions are released into the water. The sodium is added at
the rate of 7.85 mg/l per grain of 'hardness' removed. A slice of white
bread usually has 120-160 mg of sodium, a glass of V8 has 560 mg.
Softeners remove more than just calcium and magnesium (hardness
minerals); such as ferrous iron, lead, copper, manganese etc.. Water is
either hard or soft and the hardness varies in all waters.

If a softener is sized correctly and set up correctly, the softened
water will be 0 gpg hard every time you use any volume of water (in
gallons per minute flow); otherwise the softener is not working
correctly and there's little sense in using/having it. The vast
majority of people like the feel and get used to it in about 3 weeks,
then they really hate the feel of hard water when they go somewhere
that has hard water; or if their softener breaks.

Gary
Quality Water Associates

What about this: http://www.triangularwave.com/f7.htm

They sell PWT (physical or magnetic water treatment) equipment and
compare it to water softeners. Their equipment does not remove anything
from water unless they include mechanical filtration like carbon etc.
In only very few commercial/industrial cases does PWT/MWT work, it
especially doesn't work in residential applications.

Gary
Quality Water Associates