fourth year
Unless you are the only plumber, you should be getting a percentage of all the work being done since you in effect are warranteeing it. And your warranty could extend for one or two years after the work is done even if you are no longer at the company. Also, if there is a dispute with a customer and it is unresolved your license could be suspended, if that is the procedure in your area. With these potential problems using your license, you should be negotiating a better deal than just hourly wages.
