Tub and Shower drain and Venting question

[Davy Crocket]

I am remodeling my bathroom. The attached picture is what I am trying to plumb. My existing pipe is 2" and as in the crude drawing my plan is to use 2" for everything except the tub, which would be reduced at the tee and the vent was going to be 1.5 inch because that is what is already existing above the ceiling.

Is there anything wrong with my diagram?
Can the tub and shower be vented using the one vent?

Previously the shower and tub were farther apart and had separate vents, one of those was a foot over from my new shower wall in a wall I removed. The vent is 1.5 inch pipe in the roof that I will be attaching to. Everything will be properly sloped at 1/4 per foot of course.

Thanks in advance for the help

 

[Davy Crocket]

I am remodeling my bathroom. The attached picture is what I am trying to plumb. My existing pipe is 2" and as in the crude drawing my plan is to use 2" for everything except the tub, which would be reduced at the tee and the vent was going to be 1.5 inch because that is what is already existing above the ceiling.

Is there anything wrong with my diagram?
Can the tub and shower be vented using the one vent?

Previously the shower and tub were farther apart and had separate vents, one of those was a foot over from my new shower wall in a wall I removed. The vent is 1.5 inch pipe in the roof that I will be attaching to. Everything will be properly sloped at 1/4 per foot of course.

Thanks in advance for the help

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