What is a master plumber and how much they make?

According to the U.S. Bureau of Labor Statistics the estimated mean annual wage for Plumbers, Pipefitters, and Steamfitters as of May 2008 is, $49,200 This would amount to $23.65 per hour. Plumbers, pipelayers, pipefitters, and steamfitters are among the highest paid workers in construction occupations. Median hourly wages of wage and salary plumbers, pipefitters, and steamfitters were $21.94 in May 2008. The middle 50 percent earned between $16.63 and $29.66. The lowest 10 percent earned less than $13.22, and the highest 10 percent earned more than $37.93.