Weedwhacker said:I wonder if it was some sort of solvent that was used for cleaning something up? But it still doesn't seem like the odor would last so long, unless there's a saturated rag that got left behind...
Yes, and somehow it got left INSIDE the water pipes. (???) I think he would have to rip the whole shower out to get at the pipes again, unless he can cut through the insulation under the house. I think "live with it". is the only solution.
Or maybe waste a lot of water letting it flush out. However, it acts like it has to leach slowly out of something and into the water. Then, the first few gallons smell more or less bad.
At least I can ask him: "What IS this smell?"
I'll be able to ask him about it ... if he ever responds to my phone message.