| 摘要 |
PROBLEM TO BE SOLVED: To reduce resistance of a hose to improve efficiency and to prevent clogging by extending a single large diameter hose close to pumps while communicating with the lower part of a drug tank, and communicating the large diameter hose with the respective pumps through smaller diameter suction hoses branched from the large diameter hose. SOLUTION: A large diameter hose 31 is communicated with a lowermost drain part 2a of a drug tank 2. A branch body 32 is provided at the other end of the large diameter hose 31, and a plurality of suction hoses 33 smaller in diameter than the large diameter hose 31 are communicated with the branch body 32. The other ends of the suction hoses 33 are respectively communicating with the inlets of pumps 41, 42, 43, 44. The large diameter hose 31 are extended to arrange the branch body 32 in a position as close as possible to the pumps 41, 42, 43, 44, and the length of the small diameter suction hoses 33 is made as short as possible to reduce in-pipe resistance to a minimum.
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