DOT containers with an LP-gas capacity of less than how many pounds must be filled by weight only?

Under the NFPA 58 guidelines, Department of Transportation (DOT) containers used for liquefied petroleum gas (LP-gas) that have a capacity of less than 100 pounds must be filled by weight only. This regulation aims to ensure safety and accuracy in the handling and distribution of LP-gas. For containers with a capacity of less than 100 pounds, filling by weight prevents overfilling, which can lead to hazardous situations such as leaks or explosions due to pressure buildup.

Therefore, the correct answer pertains to containers with a capacity of less than 101 pounds, emphasizing the importance of weight measurements in the filling process. This ensures compliance with safety standards and provides a clear protocol for handling smaller containers safely, reducing risks associated with LP-gas use.