Vertical Wet vent for toilet & shower?

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Hi Guys,

Just want to say that this forum has certainly helped my knowledge quite a bit on plumbing codes here in Ontario.

My questions relate to the wet venting for a toilet and shower for a 1st floor bathroom master reno add. It mainly pertains to the vertical drop allowance for the distance between the WC and its vent pipe of 1 metre ( Ontario Building Code) and if this may be allowed with a wet vent. The main issue relates to the wye connection being vertical to the drain pipe roughed in the basement.

See the attached plumbing layout. The location of WC makes it such that the 3" vertical drain for the bathroom group is essentially directly underneath it, with little room to move. My plan was to simply WYE to the 2" wet vent immediately below the WC connection and not sure if that is still downstream, if the wet vent is still allowed as per the 1m vertical drop in

Bath Plumbing Schematic.jpg

Much appreciated,
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