239 ML black tank

[eoitker]

I have heard that some TT's lavatory sink and/or shower empty into the black tank. Does anyone know if that's true and if so, which does the 239ML have?
2nd question. This is our 8th outing and have a terrible smell coming from the toilet (only when it's open/flushed). We've always used tank additives. The vent seems clear, what else can be the problem and how do we fix it?
Thanks in advance!

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[ctbruce]

Do you have the fan on in the bathroom when you flush? Of you do it will pull the smell into the bathroom.

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[eoitker]

Hi,
Thanks for your reply.
We have been using the fan but only after flushing to try and get the smell out.

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[notanlines]

Be sure to check your other vent fans also