The Deluxe Under Sink Water Filter with Arsenic Pre-Filter (ESD-US4AR) combines heavy-duty primary filtration with specialized targeted arsenic reduction. Paired with a dedicated 10″ granular ferric oxide pre-filter, this dual system targets harmful inorganic arsenic contaminants for up to 1,000 gallons per cartridge. It ships with two arsenic cartridges—one installed and one reserve.

The primary ESD-US4 unit utilizes NSF 61 certified KDF® media and coconut shell granular activated carbon to provide an extraordinary 35,000-gallon service life, eliminating heavy metals, chlorine, THMs, and organic impurities while preventing bacterial growth. Available for inline hookup or with a dedicated gooseneck faucet. Unbeatable long-term value.