We actually carry both of these Cuno water filters. The difference between the two is that the model with the ""s"" has a scale inhibitor. The filter with scale inhibitor is commonly used in locations with hard water and on steam equipment and ice machines. If you'd like to order the CFS8112-S I've listed it below. https://www.etundra.com/commercial-plumbing-supplies/water-filters/replacement-water-filters/cuno-cfs8112-s-replacement-water-filter-cartridge-with-scale-inhibitor/
The "S" stands for scale inhibitor. You can use the CFS 8112, although I would recommend using the 8112-S.
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