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Similar OEM Quality, Lower Price
Premium Quality Alternative
D-40 Culligan Comparable Undersink Water Filter Replacement Cartridge by Tier1
  • Coconut Shell activated Carbon Filter
  • Independently Tested
  • Unconditional 6-Month Guarantee
In Stock
1 Filter
Save $23.00
$11.99
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100% Genuine OEM Parts
Your Current Selection
D-40 Culligan Level 4 Undersink Water Filter Replacement Cartridge
  • Coconut Shell activated Carbon Filter
  • Independently Tested
  • Unconditional 6-Month Guarantee
In Stock
1 Filter $34.99
  • Product Comparison
  • Instructions
  • Frequently Asked Questions
Recommended Low-Cost Alternative Your Current Selection
Price Per Filter As Low As $11.99 per filter with 1 pack As Low As $34.99 per filter with 1 pack
Model US-D30 D-40
Filter Life (gallons) 600 600
Filter Life (months) 6 months 6 months
Primary Filter Media Activated Carbon Block Carbon Block
Warranty Guarantee Unconditional Guarantee for Life of the Product