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WS-20 Pentek Water Softening Filter

Quick Overview

Fits most standard housings that accept 20-inch x 2.5-inch water filter cartridges

Availability: In stock

(Retail Price: $35.64 ) $28.99


The Pentek WS-20 filter provides water softening in a convenient, compact cartridge. It utilizes a bed of sodium cation beads to reduce hardness and scale deposits. This is a great option for treating hard water in a space-saving design for a small-scale setting. If you need to minimize potential limescale build-up and clogging, the WS-20 reliably delivers.
  • .75 gallon recommended flow rate
  • Effective and economical when used at the point of use for a specific application
  • Loading capacity of 1500 grains of calcium carbonate
  • FDA grade softener resin
  • Genuine OEM Product
  • User Guide for PENTEK-WS-20


Package Qty 1
Used In Brands American Plumber, Ametek, Bruner, Culligan, Kleen-Plus, Pentair, Pentek, Plymouth Products, US Filter
Manufacturer's Id WS-20
UPC 051678320037
Advertised Size (in) 20 x 2-1/2
Actual Size (in) 20 inches (length) x 2 5/8 inches (outside diameter)
Actual Size (cm) 50.8 x 6.67
Media Bed of Sodium Form Cation Resin
Primary Filter Media String-Wound Polypropylene
Materials of Construction Gasket: Buna-N, Filter Media: Standard Softener Resin(Cation, sodium-form resin, 20 x 40 mesh, R-SO3 -Na+), End Caps, Pre-Filter, and Post-Filter: Polypropylene
Filter Life (months) 6 months
Operating Temperature (°F) 40 - 100
Operating Temperature (°C) 4.4 - 37.8
Flow Rate (gpm) 0.75
Flow Rate (lpm) 2.84


Reduces the following contaminants:
  • The PENTEK-WS-20 does not reduce fluoride.


The PENTEK-WS-20 is comparable with the following part numbers

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