Update — February 2026: We previously recommended the Big Berkey as our top gravity water filter. In 2023, the EPA classified Berkey’s Black Elements as unregistered pesticides under FIFRA due to their silver antimicrobial properties, resulting in US stop-sale orders. Berkey units may still be available through secondary markets, but we can no longer recommend them as a primary purchase. Our updated pick is the Waterdrop King Tank — NSF/ANSI 42 & 372 certified, same stainless steel gra