I want to add a basement washroom to my home. I would like to include a toilet, shower and lav. I would like to wet vet the group. I know that typically the wet vent runs up through the lav but I have no wall to hide the vertical vent pipe as the lav will be facing a granite stone foundation wall. I would like to wet vent the lav and toilet through the shower drain. Would this be acceptable? I live in Ontario Canada.