Help adding toilet to laundry room

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I'm looking to add a toilet in my laundry room and need help with DWV. This is a single level home in Oregon with one full bath. Laundry room is about 25' run from main sewer. I understand that I cannot wet vent a toilet from a laundry sink and that I also need to tie the standpipe and sink in downstream of the toilet. Without changing the layout (standpipe > sink > toilet > sewer) can you pros provide the best solution to vent the toilet? Can I run a vent up between the sink and toilet and tie them all together? This is a floating 2X4 floor on top of slab and I'll need to bust up some concrete. Thanks for your help!


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