Kitchen sink in laundry room drain size issues

[packerbacker]

We have a .5 bath/laundry room and my wife wanted a LARGE sink. So we removed the pedestal sink and I've installed a 30" wide kitchen cabinet, extra deep to accommodate a large single bowl kitchen sink. All is good except for one problem. The kitchen sink drain has 1-1/2 threads to attach tailpiece. My wall has 1-1/4 threads from the original bathroom p-trap.

Looks like I have 1-1/2 PVC in the wall but the builders installed/glued on a 1-1/2 to 1-1/4 reducing trap adapter. I didn't think this would be an issue but am now stumped. I really don't want to cut back the drywall, hack off the reducer to put a 1-1/2 inch trap adapter in.

So what other options do I have? I thought about just screwing on a bushing to the 1-1/4, but id basically be using that bushing backwards of its intended purpose, I think.

Are there any obvious options that I'm missing? Can I rig up a Fernco of some sort to just reduce this thing? What am I missing? This shouldn't be so complicated but I'm seriously stumped.

 

[Terry]

They make a tools for pipoe reaming that will drill the plastic fitting out of the hub. Then you can glue in the 1.5" that you need.
The one below is for 2".

 

[Sponsor]

 

[packerbacker]

So would I then just get a male 1-1/2" trap adapter and glue inside the pipe? The reamer wouldn't take the collar off the old fitting would it?

 

[packerbacker]

never mind, I watched some youtube videos. So I cut the reducer off and ream the rest of the pipe out of the elbow and put some new 1-1/2 in and a proper 1-1/2 trap adapter and I'm golden. thanks!