flashing ring[′flash·iŋ ‚riŋ]
A ring around a pipe that holds it in place as it passes through a partition such as a floor or wall.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
A collar around a pipe to secure it as it passes through a wall or floor.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.