It is possible to prevent tree roots from obstructing sewer lines. Chemicals such as copper sulfate and potassium hydroxide can be used around the sewer line to discourage root intrusion. Metal or wood barriers can also be installed around the sewer lines to keep them free of root damage. When landscaping, it's best to limit the amount of plants or trees placed in close proximity to sewer lines.
Pipefitters, sometimes simply called fitters, install and maintain pipes that carry chemicals, acids, and gases. These pipes are used mostly in manufacturing, commercial, and industrial settings. Fitters install and repair pipe systems in power plants, as well as heating and cooling systems in large office buildings. Some pipefitters specialize as gasfitters, sprinklerfitters, or steamfitters.