VOCs (Volatile Organic Compounds). Chemicals & Organic Impurities. 1 x Three-Stage White Steel Mounting Bracket with Pre-installed Filter Cartridges. 1 x Extra Set of 3 Filters (for up to 6 months of use). 3 x Standard Filter Housings (3/4 inch NPT). 2 x 3/4″x3/4″ Fittings (nipples). 2 x On/Off Valves. Minimum Operating Pressure: 20 PSI. Maximum Working Pressure: 85 PSI. Maximum Operating Temperature: 100°F (52°C). System Dimensions: 15″ (Height) x 15″ (Width) x 6 (Depth). Flow Rate: 1 to 8 GPM. Flow rate may vary based on incoming water pressure and quality.