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Pentek 155321-43 WS-20BB Water Softening Filter

Pentek 155321-43 WS-20BB Water Softening Filter

Item SKU: 155321-43

MFG ID: 155321-43 | UPC: 688580777446

The WS series cartridges provide softened water in a convenient cartridge-style design. With its long filter life, the Pentek 155321-43 WS-20BB Water Softening Filter makes a valuable addition to the water filter system. It combines quality and functionality with durability for a lifetime of customer satisfaction.


  • The Pentek WS-20BB Water Softener Filter Cartridges contain FDA Grade Softener Resin.
  • The Pentek WS-20BB water filters provide softened water in a convenient cartridge-style design.
  • The Pentek WS20BB softening cartridges utilize a bed of sodium form cation resin beads to reduce hardness and scale deposits.
  • Convenient and space-saving design means that softened water can be provided easily and cost effectively at the exact point of need.
  • NOTE: For drinking water applications, do not use where the water is microbiologically unsafe or with water of unknown quality without adequate disinfection before or after the system.
  • Also branded under Pentek / Ametek / Culligan / Kleen Plus / Plymouth Products / Pentair / American Plumber / US Filter


  • Dimensions: 20" x 4.5" (508 mm x 114 mm)
  • Recommended Flow Rate: 2.00 gpm (8.5 L/min)
  • Capacity: 4,500 (Grains as CaCO3)
  • Temperature Rating: 100°F (37.8°C)

Materials of Construction:

  • Filter Media: Standard Softener Resin (Cation, sodium-form resin, 20 x 40 mesh, R-SO3 -Na+)
  • End Caps, Pre-Filter, and Post-Filter: Polypropylene
  • Gasket: Buna-N

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