To work independently, a plumber is required to receive a license. In most states, the prerequisite for earning this license is two to five years of practical experience. There's also an exam to test technical know-how and understanding of plumbing codes. The United Association's website offers extensive information on licensing requirements by state.
General employment within the construction sector is sensitive to changes in the economy. But job growth for plumbers is projected to be faster than the average for all jobs. New buildings and residences are being built to comply with stricter water efficiency standards and companies housed in older structures are hoping to retrofit to use more energy-efficient systems, so opportunities are in abundance. According to the Bureau of Labor Statistics, there should be a hiring spurt of 16 percent for plumbers by the year 2026, which translates to about 75,800 new jobs.