Final answer:
A plumbing inspector typically needs at least 5 years of experience as a journeyman or master plumber.
Step-by-step explanation:
The number of years of experience required for a plumbing inspector varies depending on the jurisdiction, but typically they are required to have at least 5 years of experience as a journeyman or master plumber.
This requirement is in place to ensure that plumbing inspectors have a solid understanding of the industry and are able to effectively assess and approve plumbing systems.
Having hands-on experience as a journeyman or master plumber gives inspectors the practical knowledge and expertise necessary to perform their duties accurately and efficiently.