The air vent valve of the hot spring facility was troubled by procurement of parts due to malfunction during tray vacation. However, it arrived at hand at the next day of ordering and it was saved because we could repair. Quality is no problem at all, can be used with confidence.
There is no problem for normal use, the allowable temperature is also widely widely satisfied with Cospa better than the other company's products. I have patronized about 8 years. As for the improvement point, occasionally the "float" of the air vent valve interferes with the main body and may cause malfunction. Why do not you make the "float" a little smaller?