A.O. Smith Water Filtration 100037597
A.O. Smith Water Filtration 100037597
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A.O. Smith - AOW-S500 - Salt Based Water Softener - 49,800 Grain Capacity



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A.O. Smith - AOW-S500 - Salt Based Water Softener - 49,800 Grain Capacity
A.O. Smith - AOW-S500 - Salt Based Water Softener - 49,800 Grain Capacity
Model: 100037597
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    Protect your appliances and eliminate hard water spots and stains with an A.O. Smith water softener. Soften the water throughout your home by reducing excessive calcium and magnesium. Solve the hard water problems of hard and damaging buildup on faucets, appliances, water heaters, shower heads and walls. Spend less time scrubbing hard water spots on glasses and dishes, and save money on both utility bills and cleaning supplies.
  • Designed, Engineered, and Built to Last
  • Patented, slim, single-unit design with built-in bypass valve will serve you for years to come. The Bypass Valve can isolate the softener should it malfunction or leak. It can also permit the use of untreated water for watering plants.
  • Fast & Quiet Regeneration
  • Recharges softening media quickly so you don't experience downtime. After producing 21 gallons, total length of regeneration is 27.5 minutes.
  • Power Loss Protection
  • Backup battery saves your settings in case of power loss.
  • Touchscreen Controller
  • Modify settings with ease on 2.7" monochrome touchscreen controller. Never run out of soft water with fast and quiet regeneration.
  • Self-Cleaning Pre-Filter
  • You'll never have to fuss with a filter replacement with the self-cleaning pre-filter on board.
  • Salt and Capacity Range
  • Minimum Capacity/Salt : 8,650 grains/1.66 lbs
  • Middle Capacity/Salt : 33,410 grains/8 lbs
  • Maximum Capacity/Salt : 49,800 grains/15 lbs
  • Warranty
  • One Year Complete Unit Warranty
  • Three Year Electronics Warranty
  • Six Year Valve Warranty
  • Twelve Year Media Tank and Cabinet


specs product image PID-97744
Product Category
Water Filtration
General Information
Water Softener
Product Line
Product Category
Water Filtration
Battery System
Battery Backup
Storage Type
200 lbs.
Control Type
Monochrome Touchscreen
Mount Type
Installation Location
Supply Connection Type
1" Male NPT
Return Connection Type
1" Male NPT
Potable Water Usage
Maximum Water Temperature
120 F
Minimum Water Temperature
40 F
Minimum Operating Temperature
40 F
Maximum Operating Temperature
120 F
Minimum Operating Pressure
20 PSI
Maximum Operating Pressure
120 PSI
Maximum Grain Capacity
49800 Grains
Salt Storage Capacity
200 Gallons
Maximum Hardness Removal
110 gpg
Total Length of Regeneration
42.5 Minutes
Output Between Refills
30 Gallons
Maximum Iron Reduction
10 ppm
Maximum Chlorine
0 ppm
Minimum pH
Service Flow Rate @ 15 PSI
Electrical Data
Voltage at 60 Hz
115 Volts
Product Height
39 1/2 Inches
Product Width
22 19/24 Inches
Product Depth
18 5/48 Inches
Product Weight
145 Pounds
ASNI Listed
NSF Certified Learn More
NSF Certified
The National Sanitation Foundation has developed public health standards and certification programs to protect the world's food, water, consumer products and environment.
Warranty Information
Warranty Learn More
A warranty is a safeguard from defects in manufacturing and can vary in length and terms. To see the manufacturer's warranty statement, click on the Manuals tab. Learn More
1 Year


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A.O. Smith - AOW-S500 - Salt Based Water Softener - 49,800 Grain Capacity
A.O. Smith Water Filtration 100037597
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