I need to have washer and laundry sink installed in my basement. Washer drain needs to be 2". I have only 1 1/2" pipe. Do I need to replace that cleanup box? Lokks like all this is glued together. I'm wondering if there is a way to keep existing cleanup box. I do want to do everything by code. See the image.
They make ABS pipe adapters that go from 1 1/2" size to 2" size. They do take up some vertical space so that TEE that you now have just above the 2" piece will have to be moved up to higher position.
Here is an example of one type of adapter:
(Picture source from Home Depot Web Page)