Water Softener Sizing Chart

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WATER SOFTENER SIZING CHART

HARDNESS IN GRAINS PER GALLON	NUMBER OF PEOPLE IN THE HOUSE
	1 TO 2	3 TO 4	5 TO 6	7 TO 8
0-10	16,000GR	24,000GR	32,000GR	40,000GR
11-20	24,000GR	32,000GR	40,000GR	48,000GR
21-30	32,000GR	40,000GR	48,000GR	64,000GR
31-40	40,000GR	48,000GR	64,000GR	80,000GR
41-50	64,000GR	80,000GR	96,000GR	110,000GR
51-75	64,000GR	80,000GR	110,000GR	110,000GR
76-100	80,000GR	96,000GR	110,000GR	110,000GR

SALT FREE PRO SIZING CHART

HARDNESS IN GRAINS PER GALLON	1 TO 3 PEOPLE	4 TO 6 PEOPLE	7 TO 8 PEOPLE AND LARGE HOMES
0-25	844	1054	1248
25-50	1054	1248	1248
IRON & HARDNESS	ADD IRON FILTER	ADD IRON FILTER	ADD IRON FILTER

If your water hardness is in mgl or ppm you can convert that into gpg by dividing the hardness in ppm or mgl by 17.1.

Example: 170ppm of hardness equals 9.9gpg of hardness.

Also, 1ppm of iron is equal to 5gpg of hardness when sizing a water softener.

Example: if you have 17gpg of hardness and 3ppm of iron. You should size the softener for 32gpg. 3ppm of iron times 5=15gpg of hardness. Add the original 17gpg of hardness to the 15gpg of hardness giving you 32gpg of hardness.