Pentek - CFB-PLUS10 - 10" x 2.5" Fibredyne Modified Carbon Block Filter - 5 Micron Unicel (K-40615-B) 10"x4.5" Big Blue Style Pleated 10 Micron Polypropylene Filter If your readings seem inconsistent

If your readings seem inconsistent even after calibration

remove the old membrane

petrochemicals

Commonly used in residential RO pre-filtration

and standard 20" filter housings

Pentek - CFB-PLUS10 - 10" x 2.5" Fibredyne Modified Carbon Block Filter - 5 Micron Unicel (K-40615-B) 10"x4.5" Big Blue Style Pleated 10 Micron Polypropylene Filter If your readings seem inconsistentPentek Fibredyne Technology CFB PLUS10 Modified Carbon Block Filter 10" x 2. 5" carbon block cartridge combining sediment filtration and chlorine reduction in a single, high capacity filter using proprietary Fibredyne media 5 Micron NSF Certified Materials 10,000 Gallons WHY IT WORKS Fibredyne Carbon Block Technology Dual Action Filtration Powdered activated carbon bonded to synthetic fiber matrix delivers both sediment removal and chlorine reduction