I have a drain that goes from the kitchen sink to a laundry wash tub then to a floor drain. My question is what will I have to do to connect the toilet to the drain which will be between the kitchen sink and the laundry wash tub? Will I need a vent? Any other tips would be helpful. Thanks
Todd

First, the drain has to be minimum 3". Do not connect toilet to 2" drain. It won't work. Second: by UPC, you will need vent for new toilet. However, you can connect this new vent with sink/laundry vents about 48" above the floor.