Ventilation pipe fitting for building roof has plate shaped to fit tiles and with hood and collars to cover pipe joint

摘要

The ventilation pipe fitting for a building roof has a plate (11) shaped to fit onto the existing tiles on the roof (3). The air duct receiver (13) is attached to the tile. An air vent pipe (21) extends through the receiver which is at least partially surrounded by a collar (14). A cover collar (18) of a cover hood (16) engages the first collar.