Can a toilet and sink share a vent?

As a general rule, you will be able to ventilate only 2 devices in a wet bathroom mouth. 1) Bathroom and washbasin The bathroom ventilates draining the sink. The draining of the sink should be 3, the draining of the sink is 1.5, the drainage area of the shared sink should be 2, and the mouth that goes up should be 1.5.