I have a broken p-trap under a bath sink. It is 1 1/2" pipe. it is black and appears to be ABS plumbing. It has a nut that connects the two peices of the p-trap together. The nut and treads are not standard. I cannot go to the local big box hardware store or local specialty plumbing stores to buy a replacement p-trap with a nut that fits the existing threads on the pipe end that is still in place. I have spoken to two professional plumbers and they have never seen these pipes. Again it looks like standard ABS but it is not. Any ideas what I am looking at? I don't have the confidence or knowledge to start cutting and jimmy rigging plumbing.