Have two. One is two loops of 12 volts, each 300 watts, and the other is two loops, one 12 volt 300 watts and the other 120 volts, 500 watts. One inch X 11 threads, fits most US made water heaters (or weld a 1 inch X 11 nut to your pot). Or (maybe) hang it from above into the liquid - but if...