Reliable 7500BU Dual Solenoid Steam Generator 220VThe 7500BU is our largest manual fill unit with a 9L boiler tank, 4. 0 bar pressure, all stainless steel construction. It features multiple safety systems, a blowdown valve to help maintain its life and performance and a heavy duty contactor switch. As this unit functions only with 220V electricity, you can use it with two 220V irons or an iron and a 3800IA brush, your choice! With the 7500BU you can also add our optional (#1300IA) water feed valve.