Large selection of replacement water filters, reverse osmosis membranes, testing kits and water filter system repair parts. From one water filter or membrane to case quantity discounts.

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Softening Cartridges

Softening Cartridges

Water Softener Replacement Filter Cartridges

  1. Pentek WS-10 # 155319 Water Softening Replacement Filter Cartridge
    Pentek WS-10 # 155319 Softening Filter Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands
    Pentek WS-10 # 155319 Softening Filter Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. Learn More
    $28.99 Special Price $19.99 As low as $16.99
  2. Pentek WS-20 #155320 WS20 Water Softening Replacement Soft Water Filter Cartridge
    Pentek WS-20 #155320 WS20 Water Softening Filter Cartridge Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands
    Pentek WS-20 #155320 WS20 Water Softening Filter Cartridge Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. 20 inches long. Learn More
    $39.99 Special Price $29.99 As low as $25.99
  3. Pentek WS-20BB #155321 WS20BB Water Softening Big Blue Replacement Soft Water Filter Cartridge
    Pentek WS-20BB #155321 WS20BB Water Softening Filter Cartridge Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands
    Pentek WS-20BB #155321 WS20BB Water Softening Filter Cartridge Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. Water Softening Filter Cartridge #155321 20" Big Blue. Learn More
    $64.99 Special Price $52.99 As low as $45.99
Be sure to check our Parts Department for important parts such as TDS Testers For Reverse Osmosis Membranes, Replacement Tanks, O-rings , Filter Housing Wrenches, Faucets, Pumps, Fittings, UV Systems and more parts for your reverse osmosis pure water filtration system.   View maintenance and servicing tips online at our Installation & Trouble shooting Guide.