[header] How to get a plumbing license in california [title] Graduate from high school or get a passing grade on the general educational development (ged) exam. [step] Most apprenticeship programs require that you are 18 and have received the equivalent of a high school diploma. [title] Apply for a state recognized plumbing apprenticeship program. 
[step] These programs are available through organizations or plumbing companies. They usually include coursework and on-the-job training lasting up to 4 years.