I have a 4" vent that exits the house through the block wall, then makes a
90 degree turn before it goes up again along the exterior wall. For some
reason the previous owner must have done some "home" remodeling and put a
window above where this vent exits and in order not to have a vent pipe in
the middle of the window, he created a "detour" for this pipe. This vent
pipe is for the master bath and is at the upstream most point of my sewer
line, all the other bathrooms, kitchen, laundry are downstream from it and
all of them have their own vent. I was told by someone that I can just cut
off this vent where it exits, and remove the entire vent line that twists
and turns along the block wall, and instead connect this special vent cover
to it that has a valve in it. Will this work? Is there a name for such a
vent?

Thanks in advance,

MC