I used a 30 gallon barrell and a hot water heater element with a themometer well, and a cheap contactor. It hooked to a honeywell industrial thermostat. I used a pump flange and gasket for the element. It took about two hours to get it hooked up and working. Lay the barrell on it's side and use the small bung for the thermometer well(should screw right in) the thermostat uses a built in t-couple with a short bulb and will slide into the well and uses a clip to hold it in place. I used a 110V element but for about 10 bucks more you can use a 220V higher wattage element and it will heat up very quickly. I just cut a door into the side of the barrell and used the cut out piece to make a door. It made an excellent dip tank for iron phosphate. I stopped using it because it was too small for the work I was doing so I got rid of it. I'll try to dig up some pics of it...Maybe they'll help you.