SCL10 SCL10B SCL10-B. Omnipure SCL10-B 10" In-Line Scale Inhibitor System 1/4" FPT SCL10B. This inline GAC filter w/ Phosphate is used for improving taste and odor, reducing chlorine and scale and is usable with drinking fountains, ice machines, water coolers, RO systems, and under-the-sink applications.