Install Instructions
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INSTALLATION GUIDE
2
5
Compensated Hardness is the amount
of ferrous iron present in the water as
well as hardness content.
To determine compensated hardness
in standard measurements you should
increase your water hardness setting by
5 grains per gallon (86 mg/L) for every
1 ppm (1mg/L) of ferrous iron.
Use the section below for guidance
and fill in the blank chart below to
determine your Compensated Hardness.
NOTICE: If the water supply contains ferrous iron, a commercially available resin bed cleaner should
be used every six months. Follow the instructions on the container. You should increase your water
hardness setting by 5 grains per gallon (86 mg/L) for every 1 ppm (1mg/L) of ferrous iron.
Iron Description
Ferrous Iron
(a/k/a clear water or dissolved iron)
Only type of iron that can be treated with a
water softener.
Ferric Iron
Insoluble and the particles can eventually foul
a resin bed. It should be filtered out before the
water reaches the softener.
Organic Iron or Bacterial Iron
Attached to other organic compounds in the
water. Additional treatment is needed to
remove this type of iron.
Colloidal Iron
Not dissolved, yet stays in suspension. A
softener cannot remove this type of iron.
Metric Example
Description Results
Actual Hardness 20 (gpg)
*Ferrous Iron
times five (x5)
15
Compensated
Hardness (20+15)
35
*Add five times (x5) the iron content in ppm or mg/L
to the actual hardness
Description Results
Actual Hardness 342 (mg/L)
*Ferrous Iron
times eighty-six
(x86)
258
Compensated
Hardness
(342+258)
600
*Add eighty six times (x86) the iron content in ppm
or mg/L to the actual hardness
Standard Example
This example uses 3 (ppm or mg/L) of
ferrous iron present in the water.
This example uses 3 (ppm or mg/L) of
ferrous iron present in the water.
Description Results
Actual Hardness
(use your test
results for
hardness)
Ferrous Iron
(x5 for standard)
or (x86 for metric)
+
Compensated
Hardness (add first
two results for
final result)
=
Use this blank chart to determine your Compensated
Hardness using standard measurements.
Determine Your Compensated Hardness
FERROUS IRON AND COMPENSATED HARDNESS
Ferrous Iron