Welcome to Big Brand Water Filter, Inc. — your source for reverse osmosis, water treatment, softeners UV disinfection equipment, water filtration, water purifiers, water filtration, and all the best names in water purification equipment. Big Brand offers over 100 brands of water treatment equipment. Reverse osmosis systems are offered for everything from under-the-sink water filtration to commercial reverse osmosis systems for seawater desalination at rates up to 400 GPM. Big Brand Water Filter, Inc. has replacement carbon and sediment water purification system models that filter extruded carbon block, granular activated carbon and others that fit industry standard size housings. Additionally, UV disinfection systems are offered for well water, whole house water treatment and commercial applications. Big Brand Water Filter, Inc. has water system options such as pumps for well water, whole house booster pump and instant hot water recirculation water treatment applications. Big Brand also offers all major reverse osmosis membranes, including Dow Filmtec, Hydranautics, Desal, and others for your reverse osmosis water filter. Water test strips and laboratory water tests, components, fittings, and much more at your one-stop-shop — Big Brand Water Filter, Inc. — the absolute best in online water filtration systems!