How to cleanout a clogged vent stack?
July 22, 2008 5:42 AM Subscribe
Help me best attack a clogged vent stack.
I've been in my late '30s house now for two years and the two bathroom vanities (located one on top of each other) have always drained slowly. I've cleaned out the traps and snaked periodically and that has always helped somewhat but never to the point that I could truly claim victory.
I've finally gotten around to going up on the roof to peer into the vent stack openings (I have three of them and they are all fairly large (3.5" diameter pipe). None of these pipes are covered or screened which seems like an oversight to me. I do have very large trees in front and rear of the house so who know how much stuff is down there.
Anyways, two of the the three pipes are clear. In the not clear pipe, I can see standing water. Using a manual snake, I can make it down about 11 feet before I hit an obstruction (or a piece of pipe that I can't navigate). Of that, about 7 feet of it is standing water.
I tried the snake for some time, but clearly I was unsuccessful. Besides calling a professional with a professional snake, is there anything else I can try? I've thought of trying the garden house with a straight line high pressure nozzle but haven't bought one yet. Is there any safe enzymes or bacteria that I can put down the vent stack that eat away at the (presumed) organic material that is blocking my vent? I do have a shop vac but due to roof design it would be tough and dangerous to get that up there.
Thanks in advance for all your suggestions.