How many 100lb cylinders of propane may be manifolded together for indoor use?

For indoor use, the technical guidelines set forth for the safe handling and usage of propane specify a limit on the number of 100 lb cylinders that can be manifolded together. The correct quantity is three cylinders.

This restriction is primarily in place for safety reasons, as having too many cylinders connected indoors can increase the risk of leaks and pressure issues, which can lead to hazardous situations, including the potential for explosions or fire. By limiting the number to three, it ensures adequate safety measures can be maintained, such as proper ventilation and monitoring of cylinder integrity.

Understanding this limit is crucial for proper compliance with safety standards and regulations when working with propane systems indoors. Therefore, the answer aligns with safety protocols designed to protect both individuals and property from the risks associated with propane gas use in enclosed spaces.