Jeff has a lot of good suggestions as always. The way that I would do this is to cut between the 45 coming out
the wall and the 45 that you cut in half and then go to Lowe's and buy an 11/2" socket saver and then ream that
45 coming out the wall and put in a 11/2" x 1 1/4 fitting trap adaptor and then put in a regular tubular 11/4 p-trap with
slip nuts. This is just the way that I would do it. There maybe more good suggestions..... Whomever installed that
drainage for that lavatory does not do it everyday like most of us here.
the wall and the 45 that you cut in half and then go to Lowe's and buy an 11/2" socket saver and then ream that
45 coming out the wall and put in a 11/2" x 1 1/4 fitting trap adaptor and then put in a regular tubular 11/4 p-trap with
slip nuts. This is just the way that I would do it. There maybe more good suggestions..... Whomever installed that
drainage for that lavatory does not do it everyday like most of us here.