Y: A Y-shaped plumbing fitting used to attach branch lines or to redirect flow. Also called a Y-fitting.
yard: An open space on the same lot with a building.
yard lumber: Lumber of grades, sizes and patterns that are generally intended for ordinary construction, such as framework and rough coverage of houses.
yard of concrete: One cubic yard of concrete that is 3x3x3-feet in volume, or 27 cubic feet. One cubic yard of concrete will pour 80 square feet of a sidewalk or basement or garage floor that is 3-1/2 inches thick.
yoke: The location of a home's water meter installed in a pit in the yard between two copper pipes.