Purchase the Sierra 104265 Replacement Filter Kit and save. Filter kit includes the Sierra Prefilter - 104381 and the Sierra Postfilter - 104382. The Sierra RO membrane only needs to be replaced every to two to three years.

The Sierra Reverse Osmosis System from Kinetico Water Systems utilizes a four stage process:

• Stage I and II: Encapsulated 25 micron filter removes dirt, rust, sediment and chlorine. This increases the clarity of the drinking water while proloning the life of the membrane.
• Stage III: The high performance reverse osmosis membrane reduces metals and salts such as lead, sodium and flouride.
• Stage IV: The water passes through an encapsulated, granular activated carbon post-filter to remove unpleasant flavors and odors caused by chlorine and organinc materials.