Steam pipe and Water main

Steam pipe noun - A pipe conducting steam.

Water main and steam pipe are semantically related in pipe through which water moves topic. In some cases you can use "Water main" instead a noun phrase "Steam pipe".

Water main noun - Main (a pipe or conduit) for conveying water.

Steam pipe and water main are semantically related in pipe through which water moves topic. You can use "Steam pipe" instead a noun phrase "Water main".