Specification guidelines.
Amount of high capacity resin (lbs/cu. ft)
Resin tank nominal size (in., dia. x height)
Service flow rate (gpm) (see rating label on softener)
Water supply maximum hardness (gpg)
Water supply maximum clear water iron (ppm)
Water pressure limits (min.-max. psi)
Pressure drop at rated service flow (psig)
Water temperature maximum (°F)
Water supply minimum flow rate (gpm)
Regeneration cycle flow rates (gpm)
Fill (flow to brine tank)
Brining
Brine Rinse
Backwash
Fast Rinse
Determined by water analysis from a qualified water testing laboratory.
4
Rated Capacity—See rating decal, located on the Water Softening System
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(flow to drain)
GNSF18Z
11–1/2"
INLET-OUTLET
29–3/4"
22–1/4"
20–1/4"
GNSF18Z
38/.73
10 x 21
7
25
3
20-125
15
120
3
.3
.24
.14
1.8
1.8
GNSF23Z &
GNSF35Z
INLET-OUTLET
3–3/8"
48–3/4"
41–1/4"
21–1/2"
GNSF23Z
GNSF35Z
31.2/.6
48.4/.93
8 x 40
9 x 40
8
10
50
100
3
6
20-125
20-125
15
15
120
120
3
3
.3
.3
.19
.20
.12
.16
1.8
2.0
1.8
2.0
11–1/2"
3–3/8"
18–1/4"
40–1/2"
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