LiquaGen 10" Big Blue Filter System This filter has two 10"x 4.5" water filter housing/canisters that are designed for high-flow water filtration applications. Unique, wide cartridges are capable of filtering enough water for a house, apartment or office. Compact design & easy filter cartridge changes. Pressure release Valve, Wall Bracket 1" NPT input/output (water line diameter). Assembly Required. Filters are not included in the sale. Satisfaction Guaranteed.