What is the minimum size of water service piping to a building?

The minimum size of water service piping to a building is determined by plumbing codes and standards that ensure adequate water supply for domestic use. A 3/4 inch pipe is widely recognized as the standard minimum size for residential water service. This size is generally sufficient to meet the average flow demands of a typical household, ensuring that pressure drops are minimized during simultaneous fixture use, such as when multiple faucets, showers, or appliances are in operation.

Using a 3/4 inch pipe helps to adequately handle the flow rate required for most residential applications, including drinking water, bathing, and laundry. Additionally, this size allows for the proper balance between maintaining water pressure and facilitating effective drainage in the plumbing system.

While larger pipe sizes may be necessary for specific applications or commercial buildings with higher water demand, 3/4 inch is acceptable for standard residential services, making it the correct choice in this context.