Which method is most effective for thawing a meter located in a meter pit during winter?

Using hot air from a vehicle's tailpipe is an effective method for thawing a meter located in a meter pit during winter because it provides a consistent flow of warm air directly to the frozen components. This method allows for the gradual warming of the area, which can help melt the ice without risking damage to the meter itself. The exhaust from a vehicle’s tailpipe is typically warm enough to create a thawing effect without exceeding safe temperature thresholds that could harm the meter.

Additionally, this method is practical as it requires minimal tools and can be executed relatively quickly in the field. Other options may not be as effective for several reasons. Submerging the meter in hot water could risk water damaging the meter or improperly sealed areas, while wrapping it in blankets may not provide sufficient, direct warmth to effectively thaw ice. Using a hair dryer may lead to uneven heating, creating hotspots that could damage the meter components. Therefore, the use of warm air from a vehicle's tailpipe is the optimal choice for ensuring effective and safe thawing.