What are the materials in the EX filters?
The Marathon ceramic element is made from diatomaceous earth that’s heated to the point where it just begins to melt. Most particles are caught within about .005 inch of the surface. When it clogs, you abrade away the clogged pores, making them immediately ready for more use, with almost 100% recovery after each cleaning. Marathon ceramic provides long-lasting protection from protozoa and bacteria. A block carbon core reduces tastes, odors, some chemicals, and many pesticides. The WaterWorks microfilter also incorporates a PES (polyethersulfone) membrane filter, which passes the test for a sterilizing or pharmaceutical-grade filter. It serves as a safety net, providing a second fail-safe seal.
