Household plumbing includes the manner of pipes, furniture

https://profdev-lms.tlos.vt.edu/eportfolios/1034/home/why-a-plumber-should-be-hired-for-home-leaks

Household plumbing involves the device of pipes, furnishings, and fittings put in for water distribution and waste removal in residential homes. Proper maintenance ensures competent operation and stops expensive repairs.