We had a mysterious gas-like odor coming from the area under our kitchen sink. Kevin checked all piping, determined there were no leaks outside of the area in question, replaced a couple of suspect pipes, cleaned all other pipes, and had us deep clean the disposal. The odors disappeared, and we saved the cost and hassle of a new disposal. It took two trips because of mutual scheduling issues, but the problem was resolved. We will certainly use Kevin's services again!