... DSC-B-400400750*136035 DSC-B-500500750*160030 P/T valve 1/2" magnesium bar electrical immersion heater with mechanical thermostat ... inlet, one heating source outlet,one drainage outlet, one top air vent connector, one temperature sensor hole, one temperature meter hole ... , one temperature meter, one electrical immersion heater connector, one air vent valve stainless steel buffer tank