North Star NSC40UD1 Water Softener Cabinet Model - 39,000 Grain Capacity - Ultra Demand High Flow

by North Star
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About the North Star NSC40UD1 Water Softener Cabinet Model - 39,000 Grain Capacity - Ultra Demand High Flow

The North Star NSC40UD1 exemplifies over 85 years in quality manufacturing in the water treatment industry. North Star softeners are the world’s most recognized Brand in water hardness removal technology, with over 2 Million units currently in operation. Install a North Star softener today and begin enjoying a higher quality of life through less maintenance, cleaning, and cleaner, softer water.

The North Star NSC40UD1 Water Softener Cabinet Model has a 39,000 grain Capacity and uses an ultra demand high flow valve system to maximize efficiency. Depending on the hardness of your water, the NSC40UD1 will work for most 5-10 person households. For regions with hardness levels higher than 20 grains and over 10 residents, a larger unit may apply.

North Star Water Softeners come equipped with many advanced features designed to increase the life of your water system, the softener itself, and lower your energy and maintenance expenses.

Advanced Features Include:

“Look Ahead Technology”: The intelligent patented monitoring system that actually learns your water usage patterns and becomes more efficient as it learns.  The North Star NSC40UD1’s “Look Ahead” also calculates an accurate proportion of salt and water is needed to regenerate only the used sections of the resin beads, saving you salt and water.

Super Cap Time Keeper: In the event of power failure, The North Star NSC40UD1 will remain on for 72 hours, and will retain all memory data. After the 72 hour reserve period, the unit will turn off, keeping all data stored until power is restored.

No-worry Setting: There is no need to power off your North Star softener unit when on vacation, the unit will recognize that you are not using water, and will not over-generate.

Counter-Current Regeneration: Pioneered by North Star, the brine water method of regeneration draws brine water into the resin tanks, enhancing the process, and greatly increasing efficiency.

High Capacity Resin is the most efficient and long lasting resin of its kind, with the resin bed agitator, preventing collection of iron, dirt, and solids; keeping the North Star NSC40UD1 operating at peak efficiency.

Runs on 24V Electricity to reduce electrical safety hazards.

Additional Information:

Spec Data Sheet


  • Removes Minerals such as Calcium and Magnesium 
  • Protects your plumbing, faucets, appliances, and water heater from mineral deposits and build-up
  • Leaves dishes cleaner and spot free
  • Increases water heater efficiency by up to 29%
  • Energy Efficient system pays for itself through energy, water, salt, and soap / detergent savings


  • Max Capacity: 39,000 Grains
  • Resin: 1.08 Cubic feet
  • Connection Size: 1" 
  • High Flow Valve
  • Rates Service Flow Rate: 10 GPM
  • Intermittent Flow Rate: 10.2 GPM
  • Rated Clearwater Iron Removal: 5 PPM
  • Electronics: Ultra Demand 
  • Efficiency: 5100 Grains per lb. of Salt
  • Dimensions: 50-3/4" H  x 18-1/ 4" W x 18-3/4" D
  • Connection height: 41-5/8" from the bottom of the unit


1-year Manufacturer Warranty on Parts - Contact Manufacturer for warranty details

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