plumbing
n. uncountablen. the system of pipes and equipment that carries water and waste in a building. It also refers to the work of fixing or installing these systems.
n. the system of pipes, tanks, and fittings required for the water supply, heating, and sanitation of a building. Refers collectively to both the physical infrastructure and the trade of maintaining it.
The old house needs new plumbing because the pipes are leaking.
We had to call an emergency repair service when the plumbing in the upstairs bathroom failed during the party.
Modern urban infrastructure relies on sophisticated plumbing to ensure that potable water reaches high-rise apartments while effectively managing the disposal of greywater and sewage.
Uncountable; refers to the system as a whole or the professional trade.