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Culligan D-250A Under Sink Water Filter Set

Price $56.99 List Price Price $80.99 Save 29%
Availability: In Stock
Fits most stand housings built for 10-inch x 2.5 inch filter cartridges
Choose a quantity
  • 1Filter$56.99 
  • 3Filters Price $53.62 each
  • 6Filters Price $51.29 each
  • Fast shipping!
  • Reduces contaminants down to 0.5 microns in size
  • Drop-in design makes filter changes quick and easy
  • Provides great tasting water directly from your faucet
› See more product details
  • Fast shipping!
  • Reduces contaminants down to 0.5 microns in size
  • Drop-in design makes filter changes quick and easy
  • Provides great tasting water directly from your faucet

Culligan D-250A Filter Advantages

The Culligan D-250A Water Filter Set filters the water twice producing healthier and better-tasting drinking and cooking water. The Culligan D-250A filter set consists of one granular activated carbon cartridge and one carbon block cartridge. The Culligan D-250A water filter has been tested and certified by NSF International to NSF/ANSI Standard 42 in models SY-2300, SY-2300S, and SY-2650. The Culligan D-250A water filter cartridges reduce sediment, bad taste, and odors and is recommended for use with city and well water supplies. The Culligan D-250A filter dimensions are 9.75-inch x 2.4-inch x 2.4-inch. The Culligan D-250A is a 0.5 micron extra fine water filtration set.

Universal Filter Sizing

The Culligan D-250A under sink water filter is perfectly sized for filter housings requiring 10 x 2.5 inch filters. Due to this standardized sizing these filters are compatible with many filter housing brands and are easy to exchange with existing filters and filter sets. For more specific compatible information please check out the comparables tab in the options above.

Package Qty1
Used In BrandsCulligan
Manufacturer's IdD-250A
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
MediaGranular Carbon and Carbon Block
Primary Filter MediaGranular Activated Carbon
Pre Filter MediaActivated Carbon Block
Filter Life (gallons)500
Filter Life (liters)1,892.71
Filter Life (months)6 months
Micron Rating (Nominal)0.5
Country of ManufactureUnited States
CertificationsNSF/ANSI Standard 42
IncludesOne Granular Carbon Cartridge, One Carbon Block Cartridge
Primary Filter MediaGranular Activated Carbon

Reduced Contaminants

The CULLIGAN-D-250A reduces the following contaminants:

  • Asbestos
  • Bad Taste and Odor
  • Chlorine Taste & Odor
  • Cysts
  • Lead
  • Mercury
  • Pesticides
  • Sand
  • Sediment
  • Turbidity
  • VOCs

The CULLIGAN-D-250A is comparable with the following part numbers

039861-WI-001 155584-44 D250 D250A
D-250A P250 P-250 P250A
P-250A SY-2300 SY-2300S SY-2650
W250 W-250 1019067


  1. NOTE: Install the Culligan D-250A water filters with the black gasket end pointing up.
  2. Turn off water supply. Press red pressure-relief button (if present)
  3. Unscrew housing. Remove large o-ring, wipe clean and set aside
  4. Discard used filter cartridge. Wash housing with dish soap and warm water using a nonabrasive sponge or cloth. Rinse thoroughly
  5. Fill 1/3 with water. Add about 1 tablespoon of bleach and scrub to disinfect. Rinse thoroughly
  6. Lubricate o-ring with clean silicone grease. Change o-ring if any damage cuts or degradation are present. Insert o-ring in groove
  7. NOTE: This step is important to ensure a proper housing seal. Make certain the o-ring is seated level in the groove
  8. Insert new filter cartridge
  9. Screw housing onto the cap and hand-tighten. Do not over tighten. Make sure cap standpipe slips into cartridge
  10. Turn on water supply. Press pressure-relief button (if present). Check for leaks before leaving installation