Y-fitting, wye fitting

A pipe fitting, 1, one end of which subdivides, forming two openings at an angle, usually 45° to the run of pipe.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
Begin the drain system by cutting into the main line (Photo 2) and splicing in a Y-fitting (Photo 3).
In the drain system, use a Y-fitting to connect horizontal pipes (Photo 3, p.
Where the tube passes by the downspout from the gutter, we installed a Y-fitting and drained the roof water from the gutter system directly into the main drainage line.