Water conduit and Water pipe

Water pipe and water conduit are semantically related in water main topic. In some cases you can use "Water pipe" instead a noun phrase "Water conduit".

Water pipe noun - An oriental tobacco pipe with a long flexible tube connected to a container where the smoke is cooled by passing through water.

Water conduit and water pipe are semantically related in pipe through which water moves topic. You can use "Water conduit" instead a noun phrase "Water pipe", if it concerns topics such as water main.