capillary fitting

capillary fitting

[′kap·ə‚ler·ē ‚fid·iŋ]
(engineering)
A pipe fitting having a socket-type end so that when the fitting is soldered to a pipe end, the solder flows by capillarity along the annular space between the pipe exterior and the socket within it, forming a tight fit.
References in periodicals archive ?
Joining copper pipe, on the other hand, does need some tools either for a compression fitting or a capillary fitting. The seal in a compression fitting is made by a brass olive which is like a thick wedding ring and fits onto the outside of the pipe.
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