This takes a lot to fill right at about 7 gallons. Given this large volume it takes a while to heat up and does maintain temperature very well once heated. It has 10 transducers on the bottom and cleans very well. It is noisy as are nearly all ultrasonic cleaners. Draining is easy with the drain valve. Mine came with the wrong size hose barb for the valve and the correct size was picked up at a home improvement store.