A knot in wood formed as a result of two or more branches originating from the same point.

A length of soil stack or waste stack which is usually one story high, but not less than 8 ft

A fitting used to connect one or more branch pipes to a main pipe.

A drain pipe connecting the soil line or plumbing fixtures in a building to the main line.

In a lightning protection system, a conductor that branches off at an angle from a continuous run of the conductor.

The portion of an electric wiring system that extends beyond the final overcurrent device (such as a fuse) protecting the

A plumbing fitting in a line which is at an angle to the main pipeline, usually at a right angle.

In plumbing, a pipe which originates in or discharges into a main, submain, riser, or stack.

The useful mechanical power supplied by an engine as determined by a friction brake or an absorption dynamometer that is