We recently sold our home and the buyer's inspector said we had a leak in the shower pan. The grout had come off around the drain. After 3 plumbers, the 3rd one replaced the flanged drain pipe and regrouted/cemented the drain cover. It has been 2 and a half months and we have just heard from the new owners that there is now a horrid smell coming from the shower and they can no longer use the bathroom due to the smell and of course, they want us to remedy this since we had the drain repaired. At this point I don't know what the problem is. I have talked to the plumber who wants nothing to do with it now and says it is not his problem. Any suggestions as to what this "horrid smell" could be caused by and if it could be a result of the repair that was done? We did not experience this when we were living in the house.
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