Click on the image above to view this manual (PDF)

Old style - with 180 degree rain hood - if you prefer this design, please let us know at time of ordering

American Safe Room fabricates these steel ventilation pipes for use in underground shelters. They are usually installed in pairs on a shelter for air intake and air outflow.

These pipes are 4-inch diameter welded steel pipes that are finished with a coat of primer. They feature continuous weldment construction including a mounting plate that mounts to the outside of your shelter with the included concrete wedge anchors. They can mount to either the ceiling, or the wall of a shelter. Also included is a heavy neoprene gasket that seals the mounting flange to the shelter.

The top of these pipes are terminated with a heavy duty removable steel rain hood that houses a removable (and cleanable) insect screen. We changed to this design after building vent pipes with 180 degree tops because they appear to be "stanchions" not "battleship air scoops" in order to minimize the possibility of someone spotting the location of your underground shelter. A steel post may get a second glance, a large steel candy cane in the back yard warrants a closer inspection.

These ventilation ducts are built to order. Please see the manual (PDF)for ordering details. Once we have the required information from you, we will send you a formal quotation. These ventilation pipes are a special order item.

Mounting flange, stainless steel insect screen, steel rain hood, concrete wedge anchors, and the gasket

One ceiling mount and two wall mount ventilation pipes along with some brackets for the shelter kit

The ventilation pipe mounting plate uses the same hole pattern and gasket as the blast valve- left to right: blast valve, gasket, ventilation pipe