Plumbers install, repair, modify and upkeep household, industrial and specialized plumbing. They may be called upon to install and upkeep heating systems. As part of their duties, they read and analyze plumbing and heating plans and specifications. They weld, glue, fuse and bolt materials. This essential trade is in high demand. This job requires attention to detail, resourcefulness and manual dexterity. It requires working in special conditions (wet, cold, darkness, etc.).