If only a toilet were drained from a dwelling to a sewer/septic would it need to be vented according to code or otherwise for safety?

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Originally Posted by Flickit

If only a toilet were drained from a dwelling to a sewer/septic would it need to be vented according to code or otherwise for safety?

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Code calls for every fixture that has a trap to be vented. Most toilets in a bathroom group are wet vented by the lav vent. Cheers, Tom