RO water is clean. But clean isn't the same as ideal for espresso.
The Pentair Everpure 4CM Mineral Addition Cartridge remineralizes RO-treated or low-TDS water — adding the calcium profile that makes soft water taste like espresso water.
Mineral Addition
Adds calcium carbonate to low-TDS water — rebuilding the mineral profile that reverse osmosis removes and that espresso extraction requires.
Low-Hardness Water Solution
Designed specifically for soft water regions and post-RO installations where source water TDS is too low for optimal coffee extraction.
Flavor Optimization
The right mineral content doesn't just soften water — it improves extraction. Add the minerals that draw out sweetness, brightness, and clarity.
EZ-RO Integration
Works directly with Everpure EZ-RO systems to add minerals downstream of the RO membrane — a complete, calibrated water treatment workflow.