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

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D-20A Culligan Level 1 Undersink Filter Replacement Cartridge

Quick Overview

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

Availability: In stockShips Today, Nov 29th

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Undersink replacement water filter for water filtration systems that use 9 3/4 inch x 2 1/2 inch cartridges. Fits Culligan US-550, US-600 and more.
  • Lasts four times longer than the Culligan D-10
  • Recommended for city and well water supplies
  • Granular activated carbon filter media
  • Genuine OEM Product


Package Qty 1
Used In Brands Culligan
Manufacturer's Id D-20A
UPC 033663005105
Advertised Size (in) 10 x 2-1/2
Actual Size (in) 9 3/4 inches (length) x 2 1/2 inches (outside diameter)
Actual Size (cm) 24.77 x 6.35
Media Granular Activated Carbon
Primary Filter Media Granular Activated Carbon
Filter Life (gallons) 1,000
Filter Life (liters) 3,785.41
Filter Life (months) 12 months


Reduces the following contaminants:
  • The CULLIGAN-D-20 does not reduce fluoride.


The CULLIGAN-D-20 is comparable with the following part numbers


Replacement for the Following UPC