The water main to our house is 3/4 inch, and based on the number of fixtures in the house it properly should by 1 inch or even larger. Our water pressure is fine - in fact we have a pressure reducer installed, though of course when two people are running showers at the same time there is a perceptible drop in pressure. About 20 years ago we built an addition that included roughed-in plumbing for a future bath over our garage. Now we are (finally) going through with completing that project, but the town is saying we now need a larger water main. To do this would require running about 100 feet of main and digging up the driveway, which is not something I really want to do. My question is this - given that we previously had a permit for the roughed-in plumbing, and back in those days the town didn't care about the size of the main, shouldn't this project be "grand fathered?" What are your experiences with respect to arguing for an exemption from current code requirements when completing an old roughed-in project like this?