Prevent electrocution! This is the best way to plug in a pump or other brewing or winemaking equipment because it will trip the circuit when any water flows on the ground wire. 15 Amps 1875 Watts 125 VAC 60 Hz.
Why review a GFI? Because it works, and saved me from blowing a circuit. Even if you don't have an older house, this product is a good buy to save your circuits. I use it exclusively with my March pump; only tripped it once, but better that than the circuit box.