Use and Care Manual

4
Specifications
Model GXMH31H
Rated Capacity* (Grains@ Salt Dose) 11,000 @ 2.6 lbs
24,700 @ 7.8 lbs.
31,100 @ 13.4 lbs.
Rated Efficiency** (Grains/Pound of Salt @ Minimum Salt Dose) 4,240 @ 2.6 lbs.
Water used during Regeneration (gallons/grains) 5.0 /1000
Total Water Used per Regeneration @ Maximum Salt Dose 54.7 gallons
Amount of High Capacity Ion Exchange Resin (lb/cu.ft.) 50.81/0.98
Resin Tank Nominal Size (in., dia. x height) 10 x 40
Service Flow Rate (gpm) 8.0
Pressure Drop at Rated Service Flow (psig) 6.5
Water Supply Maximum Hardness (gpg) 120
Water Supply Maximum Clear Water Iron (ppm)*** 3
Water Pressure Limits (minimum-maximum psi)**** 20-125
Water Temperature Limits (minimum-max. °F) 40-120
Maximum Flow Rate to Drain (gpm) 2.0
Rated Capacity at Chlorine Concentration***** of: 0.50 ppm
0.75 ppm
1.0 ppm
1.5 ppm
2.0 ppm
2,282,000 gal.
1,520,000 gal.
1,140,000 gal.
760,000 gal.
570,000 gal.
This system conform to NSF/ANSI 42 & 44 for the specific performance claims as verified
and substantiated by test data.
* Testing was performed using pellet grade sodium chloride as the regenerant salt.
** Efficiency rating is valid only at the lowest stated salt dosage. These softeners were
efficiency rated according to NSF/ANSI 44.
*** Extent of iron removal may vary with conditions. The capacity to reduce clear water
iron is substantiated by WQA test data. State of Wisconsin requires additional
treatment if water supply contains greater than 5 ppm clear water iron. Refer to
Cleaning Iron Out of the Water Softening System section.
**** Canada working pressure limits: 1.4–7.0 kg/cm
2
.
*****Typical residential chlorine concentration is 0.5 to 1.0 ppm.
Performance Claims
Contaminant
Influent
Challenge
Level
Maximum
Allowable Product
Water Level
Barium 10 ±10% mg/L 2.0 mg/L
Radium 226/228 25 pCi/L 5pCi/L
Test parameters include: pH = 7.5±0.5, flow rate = 7.5 gpm
and dynamic pressure = 35±5 psig
Specifications and Performance Claims