The Omnipure CL6PF5 inline filters contains polypropylene for depth filtration to remove dirt, sand, and sediment. It is friction-welded together for reliable no-leak seal. CL6PF5 filters are especially molded to eliminate channeling and to ensure a uniform water flow.

Specifications:
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.