Reverse Osmosis

C-342: TDS and EC Calibration Solutions For optimal performance, re-calibrate your meters periodically or if testing TDS or conductivity levels in wide or different ranges. FEATURES: NaCl calibration solution, available in 342 ppm Comes in...

Ideal replacement for DI Resin, Carbon, and other media used for the water purification process. Fits standard 10" cartridge housing - Designed for upflow applications to ensure the longest possible exposure time. Twist-On Cap with Sponge to prevent...