YIELD POINT--The stress at which a piece of
WYE or Y--A fitting, cast or wrought, that has one
material under strain yields markedly, becoming
side outlet at any angle other than 90 degrees. If
permanently distorted without increase of load.
no angle is specified, a Y is set at a 45-degree
YOKE-- In a rising stem valve, this is the portion of the
bonnet that supports the nut or handwheel. As applied
Y BRANCH--The same as a Y, although the term is
to pipe, the term indicates two branches-for example,
also used at times todesignate a fitting whose shape
hot and cold water uniting to form one stream.
is nearly like that of a single sweep tee.