What should be the first action taken if a plumbing pipe is frozen?

If a plumbing pipe is frozen, the most appropriate initial action is to thaw the pipe carefully. This is because attempting to replace the pipe can be unnecessary and costly, especially when the issue can often be resolved by thawing. Insulating the pipe is preventative and should be done as part of maintenance, but it does not address the immediate problem of a frozen pipe. Leaving the pipe to defrost on its own can take longer and potentially lead to burst pipes as the ice melts and increases pressure inside the pipe.

Careful thawing methods, such as applying gentle heat using a hairdryer or wrapping the pipe with towels soaked in warm water, can help restore flow without causing damage. The emphasis on careful thawing is crucial to prevent rupturing the pipe due to sudden temperature changes or using excessive heat methods, which can lead to worse outcomes. This proactive approach effectively resolves the immediate issue while minimizing risk.