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Specifications and Performance Claims.
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Model GXMH31H
Rated Capacity* (Grains@ Salt Dose) 11,000 @ 2.6 lbs
24,700 @ 7.8 lbs.
31,100 @ 13.4 lbs.
5DWHG(ȻFLHQF\*UDLQV3RXQGRI6DOW#0LQLPXP6DOW'RVH 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
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Challenge Level
Maximum Allowable
Product Water Level
Barium 10 ±10% mg/L 2.0 mg/L
Radium 226/228 25 pCi/L 5pCi/L
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and dynamic pressure = 35±5 psig
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