What experience do you need for plumbing jobs?

To be a really decent journeyman you should have at least the following 10,000 hours of OJT combined with 744 class room studies formulas /codes /welding /AGA / ASME / ASTM /ADA /NFPA 13 and 54 / then a battery of tests for each year of apprenticeship and then 4 tests upon completion of the apprenticeship program practical and theory