American Plumber is a brand of Pentair Residential Filtration, LLC. Our durable line of professional grade water filtration products addresses a wide variety of household and light commercial water quality concerns, inclu......American Plumber is a brand of Pentair Residential Filtration, LLC. Our durable line of professional grade water filtration products addresses a wide variety of household and light commercial water quality concerns, including sediment, hardness, chlorine taste & odor, and bad taste & odor, as well as reduction of lead, cysts, and organic and chemical contaminants. American Plumber products are installed by people who know water - your local plumbing professionals. With American Plumber, you enjoy the confidence of knowing that you are using the very best water filtration and treatment products available.