| 摘要 |
PROBLEM TO BE SOLVED: To provide a tube fitting capable of preventing clogging of dust, sediment, and the like without generating a clogging part on a bottom part of an enlarged diameter socket by restricting an end part of a drain pipe which is insertingly connected to deform upward or downward in the enlarged diameter socket. SOLUTION: In a tube fitting F of a catch basin type having an enlarging diameter socket 2 of a rubber ring type on an end part of a basin fitting main body 1, protrusion parts 22, 23 for restricting an end part of a connected drain pipe 4 to bending displace in upper and lower directions in the enlarged diameter socket 2, are integratedly disposed on inner surfaces of a pipe top part and pipe bottom part of the enlarged diameter socket 2.
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