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Feb 10, 2011 at 21:10 vote accept Sam Holder
Feb 10, 2011 at 21:10 comment added Sam Holder Edit the question to include the solution. Marking this as the answer as it was the vent, just blocked by the high water level.
Feb 10, 2011 at 9:00 comment added Sam Holder @Jay Bazuzi, I'm not saying it doesn't have a vent, I just don't know how to identify it and to determine if it is what is causing my problem. I'm in the basement flat of a 4 storey house, so would the vent for everyone come out on the roof?
Feb 10, 2011 at 7:31 comment added Jay Bazuzi At least in my part of the world, code requires a vent in all waste plumbing. The P-trap is supposed to stop sewer gases from coming in your home, so the vent allows pressure to equalize.
Feb 9, 2011 at 21:33 comment added Tester101 Could also be wind blowing across the vent stack, causing the water in the trap to slosh about.
Feb 9, 2011 at 20:46 comment added Sam Holder We live in a basement flat and as far as I can tell there are no vents on the pipes. The 4 pipes all meet at a sort of drain 'junction box' and there doesn't seem to be any other pipes in there. would there need to be for there to be a vent? Or could the vent let air in somewhere else? The drains all run towards the back door I think so might it be there?
Feb 9, 2011 at 19:54 history answered Eric Petroelje CC BY-SA 2.5