Which heat source is used to thaw frozen pipes concealed in walls?

The correct choice involves the use of electrical thawers, which are specialized tools designed specifically for the purpose of thawing frozen pipes. These thawers work by passing an electrical current through the pipe, generating heat that helps to melt the ice within.

This method is particularly effective for pipes that are concealed within walls, as it can target the frozen areas without the need for extensive manual work or damage to the structure.

While heat tape, motor-driven welders, and electric heating pads may also generate heat, they are not as directly effective or appropriate for thawing frozen pipes in these concealed applications. Heat tape is typically used as a preventative measure to keep pipes from freezing in the first place. Motor-driven welders are not suitable for this task, as their primary function is welding rather than heating for thawing purposes. Electric heating pads can provide localized heat, but they may not be practical for applying sufficient heat to frozen pipes that are hidden within walls.

Using electrical thawers ensures efficiency and reduces the risk of damaging the pipes or surrounding materials during the thawing process.