Go under the floor, up beside the window, Tee over to the sink location. Continue the vertical stack through the roof as a vent. Similar to the origanal.
Without going into venting theory/practices --yes. Imagine a gas can without the breather open. This is how I would pipe it.Thanks again for the reply.
Is it beacause the vent pipe air flow need to be higher than the drain ? Just trying to understand why it wont work