To activate water such as city water without replacing a part by rotating each approximately far-infrared light ray radiation ceramic board in which numbers of passage pores are formed, and collision blades are formed on the side of its input side by collision with a water flow.

In a group 10 of approximately far-infrared radiation ceramic boards comprising artificial electric stones to be set in a cylinder body 9 free in a water flow which is fitted to the collar part 6 of a cylinder main body 5 by bolts 7 and nuts 8, numbers of the ceramic boards 15 are installed on central shafts 13 installed on bearing plates 11, 12 installed in the middle parts of the base end parts of an input inside connection port 1 and an output side connection port 2 through spacers 14. In these ceramic boards 15, a lot of passage pores are formed, collision blades 17 are installed on the side of its input side, and the boards 15 are made freely rotatable by the collision with a water flow.