Pipes with a manually opened inspection door, typically placed at points in the ductwork that are prone to blockages or where the airflow or transported material needs to be inspected. It is fitted with a rubber gasket between the door and main pipe to ensure a tight seal. Transparent models are also available in Plexiglas®.
There are used to stop the airflow and usually installed to block the end of the main ductwork or a branch. The diameter matches the outer diameter of the section being blocked and the blank is attached with a pull-ring.
Funnel-shaped piece with a coupling welded to the bottom, which is fitted with a screw-on cover. Used to collect and drain condensates. Usually installed at the lowest point of the ductwork, for application in installations prone to the accumulation of condensation or oil and oily fluids.