When it comes to water pipes size matters

There has been a lot of angst over the water service. 1" or 1 1/2", what do I really need? Of course more is better, but who pays? 2 years ago, there was a class action lawsuit against Lockformer, a sheetmetal fabrication shop, who contaminated the water supply of many private wells, including ours. We got a free connection to an existing water main, but I was sleeping because I let them put a 1 inch service. I should have had the foresight to anticipate a larger service. Fortunately, the City of Downers Grove considers me an upgrade, so the tap fee (hush money) is much reduced due to the existing 1" service. Plus, the demo of the existing service, which must be done before the house can be demolished, can also be done at the same time as the new connection. All told, between me, the city, the builder and the plumber all is resolved and the demo of old and new tap will be done next week; at the same time.