| 摘要 |
PROBLEM TO BE SOLVED: To prevent the waterless operation (lost motion) in a case when the suction pipe for sucking the hot and cold water into a pump is clogged and closed, and the shutoff operation in a case when a delivery pipe for delivering the hot and cold water from the pump is clogged and closed. SOLUTION: This pump comprises a motor 1, a motor frame 2 including the motor 1, an impeller 6 for sucking and delivering the hot and cold water, a pump casing 7 including the impeller 6, and a pump casing cover 3. The pump casing cover 3 is provided with a plurality of suction pipes 4 for sucking the hot and cold water and a plurality of delivery pipes for delivering the hot and cold water.
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