The Omnipure K-Series K2328 filters feature 1/4" and 3/8" Quick-Connect fittings that make this filter really easy to install and replace. It can be used in refrigerators, ice makers, any reverse osmosis system and many under-counter water filtration systems. It also helps remove chlorine taste and odor, and taste and odor in the water.

**Interchangeable carbon with T28, T33 and T40 models.

National Pipe Thread (NPT) Size Measured Against a Ruler*
 Actual Diameter
(Inches)
National Pipe Thread (NPT)
(Fractional)
0.405" 1/8"
0.540" 1/4"
0.675" 3/8"
0.840" 1/2"

*NOTE: A very common misconception is that a 1/4" NPT measures as 1/4 inch on a ruler or tape measurer. However, that is not the case.  NPT will measure larger in diameter.  Above is a sizing reference to help clarify.