... , correctly connect the power line to the wire of the heater and then fix it tightly. The whole plastic should be water ... empty, it can burn out the heater and cause bad consequences.4,As to anti-dry heating product, at the required temperature, if ... hitch please make contact with the seller and the producing factory. HY-4 HY-1 Electrical heating element solar water heater 1500W, 2000W