Where is the propane going when used as a purge? If it stays in the pipe, you ma... | Hacker News

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bagels on Sept 24, 2022 | parent | context | favorite | on: Homemade Heat Pump Manifesto (2009)

Where is the propane going when used as a purge? If it stays in the pipe, you may create an explosive mixture. If it doesn't stay in the pipe, you might create a fireball in your face.

bluGill on Sept 25, 2022 [–]

The propose of a purge is to ensure there is nothing other than the purge gas, so there won't be an explosive mixture

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