on my 85 hilo ..in the bathroom on your left as you walk in...there is a pipe fitting on top of the cabinet and one directly above it on the ceiling...i'm guessing the sewer vent maybe?...there is no pipe between the fittings...is there supposed to be a flex pipe or collapsible pipe there?..thanks in advance

my guess would be yes

There is a pipe that slides up and down. A fitting is on the sliding pipe that screws into a fitting mounted on the ceiling they are basic plumbing parts you can get at Home Depot . My fitting broke or I would send a pic. Mine broke because the factory didn't cut the hole in the right place as it goes into the cabinet so also check that. it may be why it broke.
lincow
2202 TD Towlite

i looked in the pipe and the smaller pipe had just fallen down in....i pulled it up and all is good...thanks again for the replies