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PPM Hardness
÷
17.1 =
gpg hardness before Iron
gpg Ha (
PPM Iron x 5 ) =
gpg
coMPenSated hardneSS
P l a I n
G R I d
11x11” G R I d
15 x17 ” G R I d
18 ” d I a m e t e R G R I d
G R I d +
3 ” l e G s
G R I d +
6 ” l e G s
1 › CalCul atInG HaRdness, CaPaCIt y, and BRIne FIll
1)
Water test: Before start-up, it is crucial that you know your water’s hardneSS and Iron levels in
order to set up your unit properly.
If your unit is not programmed with your particular hardness level, it will
either regenerate too early or too late. If you do not know your water hardness or iron levels, you can take a
sample of your untreated water to a local pool shop, hardware store, or well driller
(city water has no iron)
2)
Initial hardness:
Your Hardness test results may be recorded in Grains per Gallon (gpg), Parts per Million
(PPM), or Milligrams per Liter (mg/L). Note that
PPM and mg/l are the same measure
and both figures can
be used interchangeably.
If you get a hardness level in PPM or mg/l, please divide this number by 17.1
to get Grains (gpg).
Ex: If your hardness is measured at 300 PPM, take 300 / 17.1 = 18 gpg before iron
3)
coMPenSated hardneSS:
Your Iron results should also be measured in either PPM or mg/L.
take your
level of iron multiplied by 5 and add it to the hardness level from the previous step.
This final figure will
be your
compensated hardness level
that we will program into your softener system. Ex: If your iron level is
measured at 2 PPM, add 2 x 5 = 10 Grains of hardness to existing hardness total. 18 + 10 = 28 Grains Total
4)
the compensated hardness level you just calculated will be the “hardness” value you use to identi-
fy "Unity capacity" and "lbs of Salt" per regeneration. You may record this in the table on page 2.
Depending on your compensated hardness level, you will be able to use a different salt setting for programming
and running your softener unit. The lower the hardness level, the more efficient you will be able to be with salt
consumption for regeneration
