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| We are thinking about getting a water softener. From our local water
utility, our water averages 15 - 20 grains per gallon (gpg) of
hardness, but all the water softeners capacities are simply rated as
grains. For example, one says it offers 42,000 grains capacity. I'm
guessing this is the softening capacity per day.
I'm trying to figure out how to convert 20 grains per gallon to grains
capacity.
My first thought was: grains capacity required = average water use per
person per day * number of people in household * 20 grains per gallon
However, given that we use an average of 120 gallons of water per day
per person, I would get:
x = 120 * 3 * 20
x = 7200
This is obviously wrong as no water softener has such a low rating.
Does anyone know how to figure out what capacity we need?
Thanks,
Bob/Texas
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