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.

Features:

Designed, Engineered, and Built to Last
A patented, slim, single-unit design with a 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 dont experience downtime. After producing 21 gallons, the total length of regeneration is 27.5 minutes.

Power Loss Protection
A 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: 5,210 grains/1lb
Middle Capacity/Salt: 28,775 grains/8 lbs
Maximum Capacity/Salt: 34,800 grains/15 lbs

Specifications:

AOW-S400
Flow Rate 7 GPM (L/min)
Grain Capacity 34,800
Min Pressure 20 (1.4)
Max Pressure 120 (8.3)
Min Temperature 40 F (4 C)
Max Temperature 120 F (49 C)
Inlet/Outlet 1 MIP
Certification #s Standard 44
Certifier NSF/ANSI
Max Iron Rating 10 parts per million