UNIC USA Stella di Caffe 2G Espresso Machine Steam Boiler Capacity: 8.9 liters - 6550 watts, Coffee Boiler Capacity, 2 boilers, 1.65 liters each, 2000 watts each Volts: 208-240, Watts: 6700, Amps: 30, requires dedicated 30amp plug within 4 feet of installation location FLOW: 30 GPH (maximum), PRESSURE: 20 psi (minimum), HARDNESS: 3 GPG (maximum), FITTING: 1/2" MPT w/shut off Drainage: open gravity drain of 1.25" ID within 4 feet of machine; Counter Space: 2.5" access hole needs to be in place, 4" leg extensions included Installation Included