EFCO 403 Series Roto Vent for Storefront - Manual (Page 14)

(STK0)
Order the replacement tube completely fabricated from the factory.
The length of the replacement tube is daylite opening minus 3/16".
Follow steps 1 through 4 below for roto-vent tube replacement.
EXTERIOR SIDE
Remove the retainer screws.
STEP 2
PAGE 13
Slide tube toward the interior
to remove for replacement.
STEP 4
TUBE REPLACEMENT
STEP 1
Remove the glazing gasket
(#9953)
STEP 3
Remove tube retainer
and the interior glass stop.
SECTION VII -