Product review (5 stars): Works Great, I had a blockage about 15 feet from ...
Works Great, I had a blockage about 15 feet from the outside of he house. I used a shop vac on the blow out setting on the inside of the house connected to the dryer vent.  Used this from the outside.  Once loosened it blew out great.  I rant the brush in and out several times to clean the lining of the pipe.