Hard Water? Looking for a Reliable Efficient Water Softener?

The 5900e Softener Performs Better, Lasts Longer than the Fleck 5600!

Metered On-Demand Regeneration Saves Salt and Water.

Highest Quality NSF-WQA Certified Salt-Efficient Resin.

10 Year Warranty. Free Shipping.

Now ON SALE for a Limited Time with Lower Prices, Discounted Stainless Steel Flex Lines and By-Pass Valve with Every Purchase!
satisfaction guarantee 
Softener 5900e 48K (Includes Re-Furbished Valve) Reg $649; Your Price Only $519.00

Softener 5900e 48K (Includes Re-Furbished Valve) Reg $649; Your Price Only $519.00

Satisfaction Guaranteed! Free Shipping in Continental U.S.

Code: WS005640-RF List Price: $0.00 Your Price: Shipping Weight: 125.00 lbs. Manufacturer: CWS Manufacturer#: WS005640
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Choose your options:


Pipe Size Options:

Brine Tank Options:

Questions? Get a Fast Answer to your water treatment problems, click here!

Sizing Guide

Model Number of Bathrooms in Home Pipe Fittings Included Tank Dimensions
24k 1 3/4" & 1" Width: 8" Height: 35"
32k 1 - 2 3/4" & 1" Width: 9" Height: 48"
48k 1 - 2.5 3/4" & 1" Width: 10" Height: 54"
64k 1.5 - 3 3/4" & 1" Width: 12" Height: 52"
80k 2 - 5 3/4" & 1" Width: 13" Height: 54"

Brine Tank Sizing Guide

Brine Tank Salt Capacity (lbs) Tank Dimensions
Square Brine Tank* 250 Length: 15" Width: 15" Height: 35"
Round Brine Tank 375 Width: 18" Height: 33"
Round Brine Tank 450 Width: 18" Height: 40"
Square Brine Tank 156 Length: 11" Width: 11" Height: 38"
*Standard Tank Included


  • High quality salt-efficient water softener: eliminates or dramatically reduces white spotting on fixtures and dishware
  • Prevents scale and calcium build-up inside pipes, water heaters, fixtures, and appliances
  • Counteracts drying effects of hard water, allowing you to enjoy softer skin and hair
  • Saves on laundry: clothes come out cleaner and softer without chemicals, bleach, or detergents. Clothing lasts longer!
  • Reliable CWS 5900e-E Control valve automatically backwashes and cleans the softener based on the amount of water you use, saving salt and water
  • Excellent 10 year warranty on tanks and 7 year warranty on control valves!
  • NSF certified filter tank and control valve


  • Heavy-Duty 5900e-E control valve
  • NSF certified tank
  • High-grade softener resin (with option for high-efficiency salt-saving Purolite SST-60 resin)
  • Pipe connectors


  • Max pressure recommended: 100 psi
  • Max temperature recommended: 100°F
  • Filter tank is one piece seamless polyester and NSF certified


A Few of Our Valued Commercial/Industrial Customers

  • Clean Water Systems & Stores, Inc., Water Treatment Equipment,Service & Supplies, Santa Cruz, CA