From R1552.60 Water Filtration System Also 2, 3, 4 and 5 stage systems available. Compact for Bug Out location, Office, Home, Caravan, 4x4 Trailer, or APC installation Solid & Robust: Brass Fittings for water pipe connection. No Power needed: Can be operated via a gravity feed. (3m Water Column) or connected to water mains or an inline water pump (Not included)