Jacket

In plumbing, a jacket usually refers to the outer layer or covering of a tank, pipe, or other component that provides insulation or protection. It is commonly found in water heaters, boilers, or pipes where heat retention is necessary to maintain system efficiency and prevent heat loss. The jacket helps maintain the temperature of the fluid inside the vessel or pipe, reducing energy consumption and improving overall performance. In some applications, a jacket may also provide secondary containment, offering added safety by preventing leaks or spills. Regular inspection of jackets ensures that they remain intact, properly insulated, and free from damage, which is essential for maintaining energy efficiency and preventing heat loss or freezing in plumbing systems.