The S7011 Sediment Prefilter is designed to remove sand, silt, dirt, and rust from your water. The S7011 has a 5 micron rating and is the original part for Microline RO Filter Systems CTA-14S and CTA-3.
Depending on stock you may be shipped Pentek's version of the S7011, the RS-21-SED5. The RS-21SED5 is the same as the S7011 only manufactured by Pentek. Part number 255820-43. The Microline S7011 Sediment Prefilter is also known as and compatible with the Clack FI-S-7011.