1. A vertical, or 45°, relief vent of the continuous waste-and- vent type formed by the extension of an upright wye-branch inlet of the horizontal branch to the stack. It becomes a dual yoke vent when two horizontal branches are vented by the same relief vent. Its purpose is to prevent pressure changes in the […]
A vertical pipe receiving the discharge of waste only.
A device to prevent the creation, or formation, of a vacuum by admitting air at atmospheric pressure and used to prevent backsiphonage.
One vent pipe which serves two traps. See COMMON VENT; DUAL VENT.
1. A leadworker’s tool of boxwood, shaped like a toy top and used for swedging out the end of lead pipes. 2. Something that stops an opening; plug.
A gate, or compression type, valve having a side opening or port to drain the liquid from up stream of the shut-off.
A plug with a recess in the face which a wrench will fit to turn the plug.