Household plumbing includes the equipment of pipes, fixtures

https://canvas.msstate.edu/eportfolios/12339/Home/Why_Plumbers_Are_Helpful_With_Plumbing_Issues#

Household plumbing comes to the equipment of pipes, fixtures, and fittings hooked up for water distribution and waste elimination in residential structures. Proper renovation ensures efficient operation and prevents steeply-priced maintenance.