Save with Auto-Ship

Get the product you need, exactly when you need it, delivered right to your door. No more searching for the right part number, we've got you covered. Plus, you'll save $$ on every order and shipping is on us. Learn more

Save Money

Free Shipping*

Choose Frequency

*Free Shipping available in the contiguous US

C1 Pentek Comparable Tier1 Carbon Block Water Filter

Price $9.99 List Price Price $14.27 Save 29%
Availability: BackOrder
Fits into most industry standard 10-inch water filtration system housings
  • Filters particles down to 5 microns in size
  • produces great tasting water with reduced chlorine taste and odors
  • Not recommended for use with well water
  • Works well with chlorinated water supply
See more product details
The C1 Pentek Comparable Tier1 Carbon Block Water Filter is a replacement carbon impregnated cellulose filter with polyester backing and netting for strength. This filter is effective at reducing sediment and chlorine taste and odors that normally add unappealing taste and smell to your water. This filter is compatible with Tier1's countertop assortment and can be used for additional systems that require a standard sized 10 x 2.5 inch filter. Order your replacement C1 Pentek Comparable Tier1 Carbon Block Water Filter today!

Experience the Tier1 Difference

Tier1 manufactures high-quality filtration and household products. We take creating and maintaining a healthy home seriously. Products must undergo rigorous testing and meet demanding quality expectations in order to earn the Tier1 badge. Every purchase is backed by the Tier1® Guarantee:

  • Guaranteed Fit
  • Guaranteed Quality
  • Guaranteed Price
Package Qty1
Used In BrandsOmniFilter, Pentek, Tier1
Manufacturer's IdC1
Advertised Size (in)10 x 2-1/2
Actual Size (in)10 inches (length) x 2 1/2 inches (outside diameter)
Actual Size (cm)25.4 x 6.3
Primary Filter MediaCarbon-Impregnated Fabric
Filter Life (months)6 months
Micron Rating (Nominal)5
Operating Temperature (°F)40 - 125
Operating Temperature (°C)4.4 - 51.7
Flow Rate (gpm)5
Flow Rate (lpm)18.9271
Warranty GuaranteeUnconditional Product Guarantee for Life of the Product
Primary Filter MediaCarbon-Impregnated Fabric

Reduced Contaminants

The TIER1-C1 reduces the following contaminants:

  • Bad Taste and Odor
  • Chlorine Taste & Odor
  • Odor
  • Particles
  • Particles that can carry Odor
  • Sediment

The TIER1-C1 is comparable with the following part numbers

Pentek C-1 34370 155002-43 Ace Hardware 49642
American Plumber W-5 / W5CIP Ametek Kleen-Plus C1 C1 Culligan D-10
Do It Best 432644 Flotec FPWF-TO1 Master Plumber 852-377 OB1
OB5 Omni Regular Omnifilter® TO1SS PENTEK-C1
R12 R14 T01 T01-DS
T01-SS Teledyne Water Pik IR-40 TO1 TO10SS24-02
TO1-SS24-02 TO1-SS24-05 True Value 852-377 U24
U25 U26 WHCF-WHWC RB-CB-1005


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

Reset Instructions