I've been trying to replace a corroded bathroom sink drain.
From my wall I have a 1 1/2" threaded PVC or plastic pipe. I have been attempting to attach this to the elbow from my p-trap kit using a slip joint reducer nut and washer. The nut is the right size and threading and thus can be attached on it's own. When I use the washer however the threading on the nut can't reach the threading on the pipe.
On the pipe from the wall there is a small lip between the edge of the pipe and where the threading begins. I can see the old corroded nut is much deeper which overcame this gap.
I either need a deeper reducing nut, or a thinner washer, neither of which I can find at my local Lowes (the only option in town where I live). Although I can find differently branded products online, they all appear to have the same design as the nut and washer I have.
This picture is using a different washer than the one it came with as I thought it was a little thinner, but it did not work.
How can I find the part I need, or do I need to seek a different solution altogether?