open plumbing

open plumbing

Plumbing which is exposed; the traps and drainage pipes, beneath the fixtures, are accessible, ventilated, and open to inspection.
References in periodicals archive ?
Contract awarded for 2016 per offices open plumbing inspection and diagnostic services
You want one with a tank and not the open plumbing in the back like you may see at a school.
Contract awarded for 2016 Seoul Central office open plumbing inspection and diagnostic services