Answer
A vent for a toilet allows air to pass through the drainage system so that when you flush one toilet it doesn't suck the water out of all the other toilets in the house. Also, and more importantly without a vent a vacuum would be created when flushing that would potentially pull back sewer gas. As for where the vent is located, it really depends on the particular house. Older homes tend to have just one larger vent that extends through the roof. In newer homes, local code now usually stipulates multiple vents. In either case your best bet may be to get onto the roof and see if you can locate it(them) that way.
First answer by ID0000000000. Last edit by ID0000000000. Question popularity: 232 [recommend question]
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