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.
They can mount on to the roof or wall of an underground bomb shelter. Included are heavy duty gaskets and concrete wedge anchors for easy, bolt on installation after your shelter pour has cured.
These are four inch diameter welded steel pipes that are finished with a coat of primer.
They feature continuous weld construction including a mounting plate that mounts to the outside of your shelter with the included concrete wedge anchors.
The top of these pipes feature 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, but a large steel candy cane in the back yard warrants a closer inspection.
These ventilation ducts are built to order. They are a special order item. Please see the manual for ordering details. Once we have the required information from you, we will send you an itemized quotation showing everything included. We can supply the complete pipes, concrete wedge anchors, gaskets, and penetration kits.
If you can weld steel, we can supply all of the critical components necessary to fabricate ventilation pipes.
Ventilation pipe kit
Everything except the pipe
Designed to fit 4 inch pipe with a 4.5 inch outer diameter, it includes everything you need to make one ceiling mounted ventilation pipe, except the pipe. The cost is $125.00 per kit, plus shipping.
One rain hood
One 1/4-20 security fastener and wrench
One stainless steel insect screen
One 1/4 inch steel weld on mounting flange
Eight concrete wedge anchors
One masonry drill bit sized for the anchors
Cap your own pipes
This steel rain hood slips onto a 4 inch pipe with a 4.5 inch outer diameter - either steel or plastic. You will need to drill and tap a 1/4-20 hole in the pipe for the security fastener. It is finished with primer. The cost is $55.00 each, plus shipping.
Weld-on mounting flange
Mount your own pipes
This steel mounting flange will slip onto a 4 inch pipe with an outer diameter of 4.5 inches. It is plasma cut from 1/4 inch steel. It has the same outer dimensions and hole slots as our blast valves. See the alternate blast valve installation on the blast valve page that shows how to use these flanges to mount the blast valves directly to the ventilation pipes. It is finished with primer. The cost is $35.00 each, plus shipping.
Weld-on 90 degree steel fitting
For wall penetrations
This steel 90 degree fitting is made to weld onto a 4 inch pipe with an outer diameter of 4.5 inches. This will enable you to make a wall mount ventilation pipe. It is finished with primer. The cost is $35.00 each, plus shipping.
American Safe Room provides free air filtration and component blast protection shelter consultations. Contact our Sales Manager at 541-459-1806 or send a plan view drawing of your shelter to sales@AmericanSafeRoom.com or FAX it to 503-212-6695.
Telephone 541-459-1806 or e-mail