The SCB-S is a variant within Spectrum's 870 carbon block family — check the specific product listing for the exact size and specification, since the "S" designation typically indicates a size or format variation within the standard carbon block (SCB) range rather than a different filtration technology.
Like the rest of the 870 carbon block family, it's designed for chlorine, taste and odour reduction, with VOC and THM reduction benefits from the same extruded activated carbon construction.
Typically every 3-6 months for domestic use, depending on your water quality and usage — carbon exhaustion doesn't give an obvious visual warning, so replacing on a schedule is the reliable approach.
Check the dimensions and micron rating against your housing before substituting — variants within the 870 range aren't always interchangeable, so confirm the size matches what your housing takes.
Yes — carbon block cartridges in this family are commonly used as a pre-RO stage to remove chlorine ahead of the membrane, protecting it from chlorine degradation.
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