Most Convenient Water Distiller is Lightweight with Easy-Fill Reservoir The most Convenient Countertop Water Distiller! Modern Design with Advanced Functionality. Easy operation, Refill and Reset LED indicator, Energy efficient. Lightweight, lift-out, Easy-fill water holding tank with continuous water-feed valve. Process 1 gallon of tap water in approx. 5 hours. Can make up to 4 gallons a day. 110-120 volt unit for use in North America. (Not for use in countries with higher voltage.)