New 2 inch shower drain to 1.5" abs

[blackbird]

I removed a tub which has a 1.5 inch abs drain. Im adding a shower with a center drain. From what I read I cant transition from 2 inch to 1.5 so in this picture how would I go about adding this drain?
Thanks in advance.

 

[MicEd69]

With the shower to be located towards the front of the picture, the shower drain needs to be connected to the vertical line below the floor after the 90-degree elbow shown in the picture. I believe that is a 4" main, so you should use a 4x4x2 reducing wye to enter that vertical drain line. You will need to add a vent line for the shower P-trap that would go to the vent line that I'm assuming is the vertical inside the wall at the back of the picture. That vent needs to be vertical, or no mor than 45 degrees off vertical, from the shower drain until it reaches at least 6" about the shower flood level. Obviously, that means the vent needs to be inside one of the shower walls. Depending on where the shower walls are located, you may need to be creative on how the drain gets to the vertical line and how the vent gets to the vent stack.

You can simply cut the 1 1/2" drain from the old tub and cap that line as close to the wye as possible.

If that is not your vent stack, some of my comments will need to be changed.

 

[GReynolds929]

The 3"x1-1/2" wye will need cut out, I would then hub drill/socket saver the hub of the 3" toilet wye, and install a new 3"x2" wye > 45 > 90, or combo > 90, and turn to the new drain location. You need to make sure your distance to the 3" is within your code limits.

 

[MicEd69]

The 3"x1-1/2" wye will need cut out, I would then hub drill/socket saver the hub of the 3" toilet wye, and install a new 3"x2" wye > 45 > 90, or combo > 90, and turn to the new drain location. You need to make sure your distance to the 3" is within your code limits.

Did you see where the new shower location was located? I'm not following where you are saying to install the new 3x3x2 wye.

 

[GReynolds929]

Where the existing 3x1-1/2 wye is...

 

[MicEd69]

Where the existing 3x1-1/2 wye is...

I wouldn't like a 180-degree horizontal bend in my shower drain if I had an alternate.

 

[blackbird]

With the shower to be located towards the front of the picture, the shower drain needs to be connected to the vertical line below the floor after the 90-degree elbow shown in the picture. I believe that is a 4" main, so you should use a 4x4x2 reducing wye to enter that vertical drain line. You will need to add a vent line for the shower P-trap that would go to the vent line that I'm assuming is the vertical inside the wall at the back of the picture. That vent needs to be vertical, or no mor than 45 degrees off vertical, from the shower drain until it reaches at least 6" about the shower flood level. Obviously, that means the vent needs to be inside one of the shower walls. Depending on where the shower walls are located, you may need to be creative on how the drain gets to the vertical line and how the vent gets to the vent stack.

You can simply cut the 1 1/2" drain from the old tub and cap that line as close to the wye as possible.

If that is not your vent stack, some of my comments will need to be changed.

Thank you for the detailed reply, i am not totally understanding what you mean when you say about the vent line, I will need to watch some videos on that(do you mean I need an additional vent?). You are correct that the "vent to the roof" is the one tucked in the wall. Here is another picture with a better view under the floor looking at the vent.
Thanks again

 

[blackbird]

The 3"x1-1/2" wye will need cut out, I would then hub drill/socket saver the hub of the 3" toilet wye, and install a new 3"x2" wye > 45 > 90, or combo > 90, and turn to the new drain location. You need to make sure your distance to the 3" is within your code limits.

Thank you for the reply. I had to google the "hub drill/socket" you mentioned. If your saying to cut where my picture shows, would I even have enough room to drill out that pipe?
Thanks again