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Undersink Water Filters & Filtration Systems

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  1. Culligan D-20A Undersink Water Filter Replacement Cartridge (Level 1)

    Culligan D-20A Undersink Water Filter Replacement Cartridge (Level 1)

    Fits Culligan US-550, US-600, US-600A, RO-2127, RO-3000, RO-3500, and any brand of water filtration system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More
    $16.49 Retail Price:  $23.99
  2. Culligan US-600 Slim Undersink Water Filtration System
  3. Culligan D-30 Undersink Water Filter Replacement Cartridge (Level 2)

    Culligan D-30A Undersink Water Filter Replacement Cartridge (Level 2)

    Fits Culligan US-550, US-600, US-600A, SY-2000, SY-2100, and any brand of water filtration system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More
    $27.49 Retail Price:  $37.99
  4. Culligan D-28 Undersink Water Filter Replacement Cartridge (Level 1)

    Culligan D-28 Undersink Water Filter Replacement Cartridge (Level 1)

    Fits Culligan US-550, US-600, US-600A, and any brand of water filter system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More

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