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North Star NSC31 Water softener NSC31

Common price: $799.00 Our price: $799.00 each



(All-in-one construction)
(Separate resin & brine tanks)
Model Number NSC22 NSC31 NSC42 NSCWC NST30ED NST45ED1 NST70ED1
Part Number NSC2218 NSC3118 NSC4218 NSCWC18 7366431 7366449 7366457
Household Size 1-4 1-5+ All All 1-5+ 1-6+ All
Max Capacity (Grains) 22,100 31,300 42,100 35,600 30,200 45,300 70,000
Resin (cu. Ft.) 0.65 0.81 1.20 0.98 0.78 1.26 1.94
Standard Connection Size 1″ NPT 1″ NPT 1″ NPT 1″ NPT 1″ NPT 1″ NPT 1″ NPT
Valve 3/4″ 3/4″ 1″ 3/4″ 3/4″ 1″ 1″
Rated Service Flow Rate (gpm) 7.2 7.2 9.9 8.0 7.3 10 13.5
Intermittent Flow Rate (gpm @30 psi) 11.3 11.8 17.8 17.1 11.0 18.6 21.0
Rated Clear Water Iron Removal (ppm) 6 8 11 3 8 12 19
Electronic Demand Yes Yes Yes Yes Yes Yes Yes
Maximum Efficiency (grains removed per lb of salt) 4,474 5,090 4,940 4,780 5,090 5,070 5,080
Dimension A 47.75″ 47.75″ 48″ 47.75″ 48.75″ 50″ 65.75″
Dimension B 41.5″ 41.5″ 41.5″ 41.5″ 41.25″ 41.25″ 57″
Dimension C 16.5″ 16.5″ 17″ 16.5″ 8.25″ 10.5″ 12.25″
Dimension D 19.75″ 19.75″ 21″ 19.75″ 11.5 14″ 14″
Dimension E 3.375″ 3.375″ 3.75″ 3.375″ 3.375″ 3.75″ 3.75″
1 year on complete unit – 3 years on electronic control board and valve – 10 years on salt storage tank and mineral tank




Roughly 85 percent of people in North America are supplied with hard water. Chances are you’re living with hard water.

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Hard water rears its ugly head all over the house. Many people accept the symptoms of hard water without even knowing they can be free of the issues it causes.

PROBLEMS THAT HARD WATER CAUSES INCLUDE:Effects of Hard Water 536w" sizes="(max-width: 174px) 100vw, 174px" width="174" height="300">

  • Dry Skin and Hair
  • Scale and Soap Scum
  • Spotting on Dishes and Glassware
  • Damage to Water Fixtures
  • Reduced Life of Clothing and Textiles
  • Excess Energy Use
  • Added Cost of Extra Cleaning Supplies and Detergent Use

But there’s no need to worry when you have the proper water softening system to protect your home and your family. START enjoying the benefits of having a North Star Water Softening System.


Once you’ve experienced soft water, you won’t want to live without it. That silky clean feeling. A cleaner home. Better wash results. Even savings on cleaning supplies and detergents. Your house and family will thank you!

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Stay Cleaner and Prevent Dry Skin and Hair
That same film that’s on your shower door ends up on your skin when you have hard water. Soft water does a much better job of rinsing soaps and shampoos to prevent
their drying effects.

Keep Everything Cleaner and Prevent Hard Water Damage
Soft water doesn’t leave scale and scum on your faucets, tubs and shower doors making it much easier for you to keep them clean and prevent hard water buildup that can cause damage.

Protect Your Favorite Clothing and Linens
Hard water is hard on fabrics, wearing them prematurely, and causing fading and brittleness. Soft water can extend the life of your clothes and household textiles by removing the dissolved minerals that create problems.

Reduce Soap and Detergent Use
Use up to 75 percent less detergent and get the same or better cleaning results with soft water on the job.

Reduce Energy Consumption
By preventing scale buildup inside of your water heater, you can make it up to 30 percent more efficient since it won’t have to heat your water through a layer of scale buildup.

Extend the Life of Your Appliances and Plumbing
Your water-using appliances and plumbing stay cleaner, work more effectively and last longer with soft water.


All North Star water softeners are built with the same quality and efficiency and are designed to save you time and money. Which model is right for you? Use the steps below to help guide you in your decision.

Step 1—Capacity

Determine the grain capacity of the unit. Family size, peak flow rate needs, hardness and iron minerals in water, and desired regeneration frequency, are some of the considerations to use when sizing the proper system. The chart below is a general reference.

Minimum Capacity Needed

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