Automatic electric coffee urn brews 16.3 to 18.8 gallons (61.7 to 71.2 litres) of perfect coffee per hour. unique design assures extremely low evaporation loss to maintain the brew at its flavorful peak. large water tank””over 20 gallons. draw off hot water during brewing cycle without affecting coffee quality. half-batch option. t op mounted components for ease of service. all stainless steel construction. international electrical configurations available. electrical: model requires 3-wires plus ground service rated 120/240v, single phase, 60 hz plumbing: 20-90 psi (138-621 kpa). Supplied with 3/8″ od male flare fitting.