PURPOSE: To obtain a water-saving type compact, small-sized and lightweight water resistance system device, the rated capacity of which is 200kw, it weighs about 250kg., water is not wasted by recovering it as much as possible, and this device is chiefly used for a small type power source.

CONSTITUTION: Cylindrical base electrodes 8a, 8b and 8c are constructed in such a manner that their bottomless ends are united to the upper bottom 5 of a base stand water replenishing vessel 4 in such a manner that they are freely communicated to the water-collecting floor chamber 7 located between the double bottoms. On the other hand, cylindrical main electrodes 10a, 10b and 10c are fixed to the upper end of the supporting rod, with which the output cable of a power source device is connected to the lower end, and on the other hand, the base stand water replenishing vessel 4, which recovers the boiled-up water or the overflow water by excessive replenishment during the operation, and the side of the suction hole 42 of a circulation pump 36 are connected by an overflow water returning pipe 40 with an ON-OFF valve 43.