Bathtub to shower drain conversion

[Rdwntx]

I’m in the process of converting from a bathtub to a shower. I’m changing from the 1.5” to 2” plumbing.
I’m going to use a Tile-Redi pan and don’t have access to the plumbing from below. This is what I have pieced together at this point. Is this acceptable? The bottom of the P-trap is about 2”below the level of the drain pipe to the right. Any input would be greatly appreciated. I’m going to have a one time shot at this install without having access from underneath.

 

[Breplum]

that is not proper nor will it work well.
The only way a p-trap is designed to work is having a street elbow coming off the trap, the way they are sold..
I do not recommend any amateur attempt this work.
Also, the short elbow you have under the tee must be a long sweep elbow

 

[Sponsor]

 

[GReynolds929]

That appears to be drywall underneath the trap and tgi floor joists, what is below that you don't have access to the ceiling to remove the drywall? That trap is way to deep like Breplum said, what is the reason for having it so low? It will not work well as is.

 

[wwhitney]

If you point the inlet of the san-tee directly towards the joist on the left, then you can spin the san-tee 45 degrees about the center axis of that inlet. That will let you use a (possibly street) 45 on the outlet to get the drain horizontal parallel to the joist, and then the drain can proceed to your combo wye plus 45. And you can use a (possibly street) 45 on the inlet to get the vent to vertical to rise into that wall.

Also, why did you modify the trap by inserting an extra pipe segment between the u-bend and the trap outlet elbow? What is the reason that in your existing layout the u-bend could not just be higher up as you would get with an unmodified trap? If for some reason you do need the u-bend to be so low in the joist bay, changing the san-tee orientation as in the first paragraph will help achieve that.

Cheers, Wayne