Inventors:
Stephen F. Stefely - Elmhurst IL
International Classification:
F16K 1736
Abstract:
A closure for preventing transmission of fire and smoke through a wall or floor containing a plastic pipe when the pipe is destroyed by fire, which comprises a flexible fire retardant sleeve encircling the pipe adapted to automatically collapse about the plastic pipe as it is destroyed by fire and thus close off any opening to the next level or adjacent area.