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Step 6Air Vent
Cut out the hole for the air vent using an angle grinder, make sure it is just bigger than the box section.
Slide the box section into the hole about 2 inches in, and weld in place. It should stick out about 4 inches.
For an optional air regulator, find a section of metal just big enough to rotate inside the box section.
Drill a hole either side of the box section in the center.
Push a section of bolt through, any rod will do.
Weld the section onto the rod, so that it will rotate when the rod is turned.
Bend one end of the rod 90 degrees so that it can be adjusted.
Attach a stop onto one one one end of the rod so that the friction will hold the valve open.
Slide the box section into the hole about 2 inches in, and weld in place. It should stick out about 4 inches.
For an optional air regulator, find a section of metal just big enough to rotate inside the box section.
Drill a hole either side of the box section in the center.
Push a section of bolt through, any rod will do.
Weld the section onto the rod, so that it will rotate when the rod is turned.
Bend one end of the rod 90 degrees so that it can be adjusted.
Attach a stop onto one one one end of the rod so that the friction will hold the valve open.
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