In our brand new house the toilets let out a huge bubble when they are flushed. What is causing this? I talked to Elizabethan Classics (toilet manufacturer) and they said this definitley shouldn't be happening in our style of toilet. They think it may be an air-lock in the sewer line or bad venting. I sincerly doubt it's bad venting. It must be an air lock, how do I get rid of it?
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