Ventilation Pipes

 

Bolt on ventilation pipes

These are heavy duty steel ventilation pipes for use in underground shelters that are the correct size to work with the either the 60 CFM or 120 CFM Safe Cell. They are usually installed in pairs – one for the air intake and one for the air outflow. You can mount them on either the roof or the wall of an underground shelter.

They feature bolt on installation with the included concrete wedge anchors and heavy synthetic rubber gasket. Also available are the individual components for welding up your own steel ventilation pipes.

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.

What’s Included

These ventilation ducts are built to order. They are a special order item. Please see pages 9 and 10 of the manual for ordering details. Once we have the required information from you, we will send you an itemized quotation showing everything included. We normally supply the complete pipes, concrete wedge anchors, gaskets, rain hoods, insect screens, security fasteners, and a wrench with each set (intake and outflow pipes).

Build your own ventilation pipes

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
ASR-50-VPK 
– $125 each, plus shipping
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.

  • 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
  • One gasket
  • Eight concrete wedge anchors
  • One masonry drill bit sized for the anchors

Rain hood – cap your own ventilation pipes
ASR-50-RH 
– $55 each, plus shipping
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 durable shop coat primer. Included with each rain hood:

  • One rain hood
  • One 1/4-20 security fastener & wrench
  • One stainless steel insect screen

Weld-on mounting flange – mount your own ventilation pipes
ASR-BV-F – $35 each, plus shipping
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. Finished with durable shop coat primer.

Weld-on 90 degree steel fitting – for wall penetrations
ASR-50-90F 
– $35 each, plus shipping
This steel 90 degree fitting is made to butt 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 durable shop coat primer.