camperforlife wrote:
If you have the Coroplast and it is in one piece like mine, the easiest way to access it is cut a three sided flap with the uncut side facing the front side of the trailer so when you close it back up it won't catch the wind.
When it is time to seal it back up poke a couple holes on the loose end of the flap and a couple opposite of the flap on the uncut section. Loop a couple zip ties from the holes in the flap to the holes you punched in the uncut Coroplast. Now that the flap is solid and won't try to spring down you can seal the cut with Gorilla tape.
Exactly what I did, but used black duct tape. I actually did flaps on either side of the valve. Opened up kind of a like a bomb bay on an airplane.