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WS-20BB Pentek Whole House Filter Replacement Cartridge

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WS-20BB Pentek Whole House Filter Replacement Cartridge

Save 12% (MSRP: $52.08)

Quick Overview

Fits any standard housing that uses 20-inch x 4 1/2-inch filter cartridges
5 2


The PENTEK-WS-20BB cartridge is designed to allow optimal contact between water and resin surfaces, ensuring maximum ion exchange. The internal expansion pad minimizes channeling, while the post filter eliminates any potential for bypass. Under optimal operating conditions the WS-20BB can effectively treat water in applications desiring low hardness and scale deposits with a capacity of 4,500 grains.


Package Qty 1
Used In Brands Cuno, Filterite, Harmsco, Keystone, Pentek, U.S. Water, US Filter
Manufacturer's Id WS-20BB
UPC 051678321034
Advertised Size (in) 20 x 4-1/2
Actual Size (in) 20 inches (length) x 4 1/2 inches (outside diameter)
Actual Size (cm) 50.8 x 11.43
Media Softener Resin
Primary Filter Media Ion Exchange Resin
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
Micron Rating (Nominal) 10
Operating Temperature (°F) 40 - 100
Operating Temperature (°C) 4.4 - 37.8
Flow Rate (gpm) 2
Flow Rate (lpm) 7.571


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


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


Replacement for the Following UPC