I bought an Iwaki 15 pump 100Volt(Japan) for $20. It gets pretty warm on 110Volts, and it is volumetrically just fine. The Iwaki site says to 180 degrees F. I also just bought 2 - 110Volt Iwaki 20's for $30. They are bigger volume and head also 180 degrees. I will use my new March 815 for the BKettle and Iwakis for 2 other pumps and have a spare. Careful to do good cleaning and beware some were used in photo processing and very dark (likely silver oxide?). Mine all were very clean looking, sterilized and tested for taste. All seems good.