Fully Automatic Controls for Classic Stills provide for unattended operation. Stops still when storage tank is full, starts still when storage tank water level falls below preset level. Drains still boiler at your selected 2, 4, 8, or 16 hr. intervals to reduce scale formation. The Controls include: control box, storage tank monitor, Inlet piping includes: solenoid valve, pressure gauge, manual regulating valve. Boiler drain includes: piping, solenoid valve and manual valve. 120 VAC.