Joe,

I cannot, because the vent pipe is completely embedded inside the
wall. It is a two-story house, and the horizontal part of the vent
pipe is in between the ceiling of ground story and floor of the second
story. I am just a little worried that if I break the connection, how
difficult it is to fix.

Thanks anyway
Chang


osspam (Joe Bobst) wrote in message ...
I put a sewer snake through both ends, trying to break the
lint.

Can't you simply disassemble the entire pipe run for clean out? Alternatively,
use a shop vacuum to remove debris. HTH

Joe