You can be able to train for a plumbing job in different community colleges and trade schools that are available in different states. You could also receive your training when you are on the job working as a plumbing apprentice. Plumbing apprentices tend to go for around 4years to 5 years. This usually involves an on the job training as well as classroom training which goes for a total of 144 hours.
Even though the requirements that may be needed may vary from one location to another, you may need to have between two and five years of experience. You also need to have completed a test that covers the local code and trade knowledge and must have passed.