'76 International plumbing roof vents
The PO of my trailer really must have thought his excrement had no odoure, he taped all the roof vents shut. They have no "caps" like the other roof vents I've seen on SOB's, are they supposed too? I'm leaving the tape on until I find out, don't want rain water getting in around the plumbing. (House vents are open on top, rain just runs into the sewer.)
By the way they are the rectangular vents, I can't seem to find a picture of one, or a supplier.