Culligan D-40A Under Sink Water Filter Replacement, Superior Filtration
Culligan D-40A Under Sink Water Filter Replacement, Superior Filtration
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Culligan D-40A Under Sink Water Filter Replacement, Superior Filtration

4.9 stars out of 27 reviews
(4.9)|
27 ratings

Key item features

  • Universal Compatibility: Easily fits inside the Culligan Filtration System US-600A and is compatible with most other under sink filtration systems.
  • Lead and Microplastics Reduction: Reduces lead and microplastics for healthier water and improved taste.
  • Improved Taste and Odor: Reduces contaminants like chlorine for better tasting and smelling water.
  • Premium Quality Filtration: Activated carbon filter tested and certified by IAMPO to reduce lead, microplastics, chlorine, asbestos, atrazine, mercury, and turbidity.
  • Long-lasting Performance: Lasts up to 6 months or 600 gallons with a flow rate of 0.6 gallons per minute.
  • Easy Installation: Comes with step-by-step instructions for a hassle-free setup under your sink.
  • Cost-effective Solution: Helps save on water bills by reducing the need for single-use plastic water bottles.
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Current price is Now $31.99
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was $49.42
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Columbus, 43215
Arrives by Thu, Feb 5
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4.3428571428571425 stars out of 5, based on 140 seller reviews(4.3)
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Shipping, arrives by Mon, Feb 9 to Columbus, 43215
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Culligan D-40A Under Sink Water Filter Replacement, Superior Filtration
Culligan D-40A Under Sink Water Filter Replacement, Superior Filtration
current price Now $31.99, Was $49.42
Culligan D-40A Under Sink Water Filter Replacement, Superior Filtration
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Comparison Chart:
Filtration stages1Culligan D-40A Under Sink Water Filter Replacement, Superior Filtration-Waterdrop WD-RF15-UF Water Filter, Replacement 15UA-UF Under Sink Water Filtration System, 0.01 Micron, 16000 Gallons High Capacity-Waterdrop RF10W-UF 0.01 Micron Water Filter, NSF/ANSI 42 Certified, 8K Gallons High Capacity, Replacement for Waterdrop Under Sink Water Filtration System, White1Under Sink Water Filter Install Kit, Complete Filtration System for Kitchen and Bathroom Faucets-Replacement Pads - TEN PACK - For Mechanical Leak Detectors/Water Stop Valves - For Under Sink Reverse Osmosis and Water Filtration Systems (18mm)3Vortopt Q5-UF 0.01 Micron Ultrafiltration 19K Gallons Under Sink Water Filtration System With Faucet - 24 Months Filter Life, Reduces Chlorine, Bad Taste & Odor1A. O. Smith Basic Main Faucet Under Sink Replacement Filter for AO-MF System
FeaturesAdjustableCulligan D-40A Under Sink Water Filter Replacement, Superior FiltrationTwist And Lock DesignWaterdrop WD-RF15-UF Water Filter, Replacement 15UA-UF Under Sink Water Filtration System, 0.01 Micron, 16000 Gallons High CapacityTwist And Lock DesignWaterdrop RF10W-UF 0.01 Micron Water Filter, NSF/ANSI 42 Certified, 8K Gallons High Capacity, Replacement for Waterdrop Under Sink Water Filtration System, White-Under Sink Water Filter Install Kit, Complete Filtration System for Kitchen and Bathroom FaucetsEasy InstallationReplacement Pads - TEN PACK - For Mechanical Leak Detectors/Water Stop Valves - For Under Sink Reverse Osmosis and Water Filtration Systems (18mm)Twist And Lock DesignVortopt Q5-UF 0.01 Micron Ultrafiltration 19K Gallons Under Sink Water Filtration System With Faucet - 24 Months Filter Life, Reduces Chlorine, Bad Taste & Odor-A. O. Smith Basic Main Faucet Under Sink Replacement Filter for AO-MF System
Height9.75 inCulligan D-40A Under Sink Water Filter Replacement, Superior Filtration15.59 inWaterdrop WD-RF15-UF Water Filter, Replacement 15UA-UF Under Sink Water Filtration System, 0.01 Micron, 16000 Gallons High Capacity11.1 inWaterdrop RF10W-UF 0.01 Micron Water Filter, NSF/ANSI 42 Certified, 8K Gallons High Capacity, Replacement for Waterdrop Under Sink Water Filtration System, White2"Under Sink Water Filter Install Kit, Complete Filtration System for Kitchen and Bathroom Faucets-Replacement Pads - TEN PACK - For Mechanical Leak Detectors/Water Stop Valves - For Under Sink Reverse Osmosis and Water Filtration Systems (18mm)5.4 inVortopt Q5-UF 0.01 Micron Ultrafiltration 19K Gallons Under Sink Water Filtration System With Faucet - 24 Months Filter Life, Reduces Chlorine, Bad Taste & Odor14.5 inA. O. Smith Basic Main Faucet Under Sink Replacement Filter for AO-MF System
Items includedD-40A cartridgeCulligan D-40A Under Sink Water Filter Replacement, Superior FiltrationWater FilterWaterdrop WD-RF15-UF Water Filter, Replacement 15UA-UF Under Sink Water Filtration System, 0.01 Micron, 16000 Gallons High Capacity-Waterdrop RF10W-UF 0.01 Micron Water Filter, NSF/ANSI 42 Certified, 8K Gallons High Capacity, Replacement for Waterdrop Under Sink Water Filtration System, White-Under Sink Water Filter Install Kit, Complete Filtration System for Kitchen and Bathroom FaucetsReplacement PadsReplacement Pads - TEN PACK - For Mechanical Leak Detectors/Water Stop Valves - For Under Sink Reverse Osmosis and Water Filtration Systems (18mm)-Vortopt Q5-UF 0.01 Micron Ultrafiltration 19K Gallons Under Sink Water Filtration System With Faucet - 24 Months Filter Life, Reduces Chlorine, Bad Taste & OdorReplacement FilterA. O. Smith Basic Main Faucet Under Sink Replacement Filter for AO-MF System
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Customer ratings & reviews

4.9 out of 5 stars
stars27 ratings19 reviews
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Reviews summary

Pros
  • : Offers affordable options.
Neutral
  • : Can be straightforward, but may require additional parts.
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Showing 1-3 of 19 reviews

Oct 31, 2025
Larry
Item details
Color: White
Multipack quantity: 1
Sold byRummageTXDelivered byWalmart
5 out of 5 stars review

Verified Purchase

Great quality and price for pure water!

I have a two stage under-sink generic (standard 2" x 10" filter cartridge) filter for drinking and cooking. I've been using the Culligan D40A for years as my second stage. My water is better quality than any bottled water in taste and measurements of impurities which has convinced many friends and family members to install a filtering system. What blew me away was the price for this filter cartridge; unbeatable! The 600 gallon usage is also great and I've installed a small water meter to keep tabs on it. I highly recommend this product.

Incentivized Review
Helpful?4PV1G7LEUFTL15552350
Sep 23, 2025
RoyalOaker
Item details
Color: White
Multipack quantity: 1
Sold byJMAV DealsDelivered byWalmart
5 out of 5 stars review

Verified Purchase

Great filter, great price

I've used this filter many times. The water taste great. The filter is easy to change and very little time is needed. What I like the best about this purchase is the price. This is a great price for the filter.

Incentivized Review
Helpful?4PV1G7LEUFTL15552350
Sep 13, 2025
G
Item details
Color: White
Multipack quantity: 1
Sold byLilias UnlimitedDelivered byWalmart
5 out of 5 stars review

Verified Purchase

One of the better choices for undersink filters. More cost effective than other high quality filters. You have to spend quite a bit more to get only very marginal improvement over these.

Incentivized Review
Helpful?4PV1G7LEUFTL15552350