PURIFIER OF BATHTUB

摘要

PURPOSE:To purify the hot water of a bathtub and to inject jet water using the same flow passage. CONSTITUTION:The water suction port 2 and water emitting port provided to a bathtub 1 are connected by circulating passage 4 and a sand filter tank 14 and a biological filter tank 5 are successively arranged on the way of the circulating passage 4 in series on the upstream side of the water suction port. The circulating pump 13 for returning the hot water sucked from the water suction port 2 to the bathtub 1 from the water emitting port 3 through the sand filter tank 14 and the biological filter tank 5 is provided to the circulating passage 4. The water suction port and the sand filter tank 14 as well as the biological filter tank 5 and the water emitting port 3 are connected by connection flow passages 27. The jet pump 26 for sucking the hot water from the water suction port 2 to inject the same from the water emitting port through the connection flow passages 27 is provided to the connection flow passages 27.