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To Increase Water Main Size from 3/4" to 1" must tap into city line also be 1"?
My plumber discouraged me from increasing main size from 3/4 to 1", saying there would have to be adapters at each end. But if the tap at the city line was changed to 1"--more expensive I'm sure--then adaptor would only be on the house side. I feel for re-sale value of house someday--when someone might want to expand it--1" is a good size, even 1.5 wouldn't be ridiculous. Even for us, where the piping to all sinks, etc. is only 1/2", it would mean one could shower with the dishwasher, washing machine or another faucet on and not feel pressure drop. I gather the tap size at the city main must be at least as big as the main going into the house.