Pentek Gs-10cal/ro-B in-Line Reverse Osmosis Calcite/carbon PH Stabilizer Cartridge, 10" (item #255541-43)

Item #: 255541-43 (GS-10CAL/RO-B)
Dimensions: 10" (2" diameter)
Media: Coconut shell GAC + calcite (pH-correcting)
Function: pH stabilization, water polishing, taste improvement
Max Pressure: 125 PSI
Temp Range: 40°F–100°F
Filter Life: ~3–6 months (usage/water-quality dependent)
Compatible Systems: Most RO and under-sink filtration systems

Improve the taste and pH balance of your reverse osmosis water with the Pentek GS-10CAL/RO-B in-line filter cartridge (Item #255541-43). This 10" combination cartridge pairs coconut shell granular activated carbon (GAC) with calcite media, making it ideal for correcting low pH levels, polishing filtered water, and improving the taste of coffee, tea, and other beverages made with RO water.

As calcite dissolves gradually in acidic water, it naturally raises pH toward neutral, counteracting the slightly acidic output common to many RO systems, while the coconut shell carbon component helps reduce sediment, bad taste, odor, and residual chlorine as a final post-filter stage. Designed for easy installation, the GS-10CAL/RO-B is compatible with most reverse osmosis and under-sink water filtration systems.

With a typical filter life of approximately 3–6 months (depending on water quality and usage), the GS-10CAL/RO-B is a simple, effective add-on for anyone looking to fine-tune their RO system's final water quality and taste.